isletn.

/ˈʌɪlɪt/

Forms: Also 1500s islette.

Etymology: < French islette, modern French îlette, diminutive of isle n.: see -et suffix¹. See also islot n., isolet n.

1. A little island, an eyot or ait.

ΘΚΠ

the world > the earth > land > land mass > island > [noun] > small

aiteOE

islec1290

inchc1425

isleta1552

isolet1613

insulet1622

motu1770

sand key1775

islot1790

oe1810

illaun1882

sand cay1934

a1552 J. Leland Itinerary (1711) II. 26 I passid over Frome Water,..where the Water brekith into Armelettes and makith Islettes.

1610 P. Holland tr. W. Camden Brit. ii. 219 Shetland is an Isle..environed with other Islets.

1774 O. Goldsmith Hist. Earth VI. 118 Where there is an islet in the stream.

1859 J. M. Jephson & L. Reeve Narr. Walking Tour Brittany vii. 89 A little islet on the coast still bears the name of Avalon.

figurative.1883 R. L. Stevenson Silverado Squatters 228 Mere islets of business in a sea of sunny day-time.

2. transferred.

a. Something resembling an island in position; a small piece of land markedly differing in character from that by which it is surrounded, as a wooded eminence in a marsh or plain; any isolated tract or spot; = island n. 2a. Also = island n. 2d.

ΘΚΠ

the world > the earth > land > landscape > [noun] > landform > of distinct character

isleta1650

society > communication > indication > marking > a mark > trace or vestige > [noun] > fingerprint > configurations in

loop1880

whorl1880

island1891

islet1921

a1650 G. Boate Irelands Nat. Hist. (1652) xiii. 111 Little Tufts or Ilets..consisting of Reeds, Rushes, high sower Grass,..a few feet in compass;..These little Ilets or Tufts being..spread over all the Bog.

1791 W. Bartram Trav. N. & S. Carolina 140 Expansive green meadows or savannas, in which are to be seen..islets of Oak and Bays.

1826 W. Kirby & W. Spence Introd. Entomol. IV. 286 Islet.., a spot of a different colour, included in a plaga or macula. Ex. The Ocelli in the Primary Wings of Hipparchia Semele.

1860 J. Tyndall Glaciers of Alps i. iii. 27 An islet of stones and débris, where we paused to rest ourselves.

1864 Ld. Tennyson Aylmer's Field in Enoch Arden, etc. 54 A but less vivid hue Than of that islet in the chestnut-bloom Flamed in his cheek.

1871 E. F. Burr Ad Fidem xv. 308 Those islets of light which roam so mazily in the dark deeps.

1921 Discovery Oct. 257/2 A dozen guiding marks, consisting of the beginnings of lines, bifurcations and islets.

b. An isolated piece of animal or vegetable tissue. islet (or Islet) of Langerhans [translating French îlot de Langerhans (E. Laguesse 1893, in Compt. rend. hebdom. d. Séances et Mém. de la Soc. de Biol. XLV. 819): named after Paul Langerhans (1847–1888), German anatomist, who, in 1869, first described such islets] , any of numerous highly vascular islets of tissue in the pancreas, composed of light-staining cells of two principal types, one of which secretes insulin and the other glucagon; also elliptical.

ΘΚΠ

the world > life > biology > substance > [noun] > isolated or differentiated

islet1851

island1879

the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > isolated piece of

islet1851

the world > life > the body > secretory organs > gland > specific glands > [noun] > glands having gastric secretions > parts of pancreas

islet (or Islet) of Langerhans1896

1851 W. B. Carpenter Man. Physiol. 164 The temporary Cartilages..are equally destitute of vessels when their mass is small; but if their thickness exceed an eighth of an inch, they are permeated by canals for the transmission of vessels. Still these vessels do not ramify with any minuteness in the tissue; and they leave large islets, in which the nutritive process must take place on the plan just described.

1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 499 Especially in their [the Caryophylleæ] rhizomes, thin-walled, long-celled parenchyma, often forming large irregular islets or annular segments, is inserted between fibrous masses of similar form.

1896 Jrnl. Royal Microsc. Soc. 35 Besides the solid buds which form the first ‘islets of Langerhans’, they give rise to numerous hollow buds.

1897 T. C. Allbutt et al. Syst. Med. III. 955 The ulceration is so extensive that only islets of mucous membrane are left here and there.

1898 T. C. Allbutt et al. Syst. Med. V. 204 Islets of spongy tissue separate the individual nodules [of tubercle].

1904 Proc. Royal Soc. 73 84 The degeneration or absence of the islets in diabetes.

1910 Practitioner Jan. 32 Many other pathological conditions..have been ascribed to abnormalities of other ductless glands; e.g...glycosuria to the loss of the internal secretion formed by the islets of Langerhans in the pancreas.

1968 Times 27 Nov. 9/3 Those parts of the organ [sc. the pancreas] concerned with carbohydrate metabolism—known as the islets of Langerhans.

1973 Nature 23 Mar. 259 Yields of up to 350 Islets per rat pancreas have been achieved using this method.

3. attributive.

ΚΠ

1810 W. Scott Lady of Lake iii. 99 Abrupt he paced the islet strand.

1861 Sat. Rev. 12 388/1 St. Helier, too, has its islet-castle, built by Queen Elizabeth.

1861 Sat. Rev. 12 388/2 An islet-breakwater.

1861 Sat. Rev. 12 389/1 An islet-rock.

1871 R. Ellis tr. Catullus Poems xxviii. 12 Was only this the plea Detain'd you in that islet angle of the west?

1877 J. C. Geikie Life & Words Christ I. xxix. 480 Constellations anchored on the vast expanse like tiny islet clusters on the boundless ocean.

1899 Westm. Gaz. 2 Oct. 10/1 Signalling from lightships and islet lighthouses to the mainland.

1914 E. A. Schäfer Introd. Study Endocrine Glands 84 The results of pancreas-extirpation and pancreas-grafting can..be best explained by supposing that the islet-tissue produces an autacoid substance which passes into the blood and affects carbohydrate metabolism and carbohydrate storage in such a manner that there is no undue accumulation of glucose in the blood. Provisionally it will be convenient for description purposes to refer to this hypothetical autacoid as insuline.

1927 J. B. S. Haldane & J. S. Huxley Animal Biol. xii. 279 Islet cell of human pancreas.

1962 Lancet 12 May 1003/2 The characteristics of the Zollinger–Ellison syndrome are extreme gastric hyper~secretion, intractable peptic ulceration..and either hyperplasia or tumour of the islet-cells of the pancreas.

1963 E. J. W. Barrington Introd. Gen. & Compar. Endocrinol. iii. 43 We have evidence that islet tissue arose very early in vertebrate evolution.

1965 J. Lee & F. Knowles Animal Hormones vii. 113 Occasionally in man a tumour of the islet cell occurs and there is excessive secretion of insulin.

This entry has not yet been fully updated (first published 1900; most recently modified version published online December 2021).

单词	islet
释义	isletn. /ˈʌɪlɪt/ Forms: Also 1500s islette. Etymology: < French islette, modern French îlette, diminutive of isle n.: see -et suffix¹. See also islot n., isolet n. 1. A little island, an eyot or ait. ΘΚΠ the world > the earth > land > land mass > island > [noun] > small aiteOE islec1290 inchc1425 isleta1552 isolet1613 insulet1622 motu1770 sand key1775 islot1790 oe1810 illaun1882 sand cay1934 a1552 J. Leland Itinerary (1711) II. 26 I passid over Frome Water,..where the Water brekith into Armelettes and makith Islettes. 1610 P. Holland tr. W. Camden Brit. ii. 219 Shetland is an Isle..environed with other Islets. 1774 O. Goldsmith Hist. Earth VI. 118 Where there is an islet in the stream. 1859 J. M. Jephson & L. Reeve Narr. Walking Tour Brittany vii. 89 A little islet on the coast still bears the name of Avalon. figurative.1883 R. L. Stevenson Silverado Squatters 228 Mere islets of business in a sea of sunny day-time. 2. transferred. a. Something resembling an island in position; a small piece of land markedly differing in character from that by which it is surrounded, as a wooded eminence in a marsh or plain; any isolated tract or spot; = island n. 2a. Also = island n. 2d. ΘΚΠ the world > the earth > land > landscape > [noun] > landform > of distinct character isleta1650 society > communication > indication > marking > a mark > trace or vestige > [noun] > fingerprint > configurations in loop1880 whorl1880 island1891 islet1921 a1650 G. Boate Irelands Nat. Hist. (1652) xiii. 111 Little Tufts or Ilets..consisting of Reeds, Rushes, high sower Grass,..a few feet in compass;..These little Ilets or Tufts being..spread over all the Bog. 1791 W. Bartram Trav. N. & S. Carolina 140 Expansive green meadows or savannas, in which are to be seen..islets of Oak and Bays. 1826 W. Kirby & W. Spence Introd. Entomol. IV. 286 Islet.., a spot of a different colour, included in a plaga or macula. Ex. The Ocelli in the Primary Wings of Hipparchia Semele. 1860 J. Tyndall Glaciers of Alps i. iii. 27 An islet of stones and débris, where we paused to rest ourselves. 1864 Ld. Tennyson Aylmer's Field in Enoch Arden, etc. 54 A but less vivid hue Than of that islet in the chestnut-bloom Flamed in his cheek. 1871 E. F. Burr Ad Fidem xv. 308 Those islets of light which roam so mazily in the dark deeps. 1921 Discovery Oct. 257/2 A dozen guiding marks, consisting of the beginnings of lines, bifurcations and islets. b. An isolated piece of animal or vegetable tissue. islet (or Islet) of Langerhans [translating French îlot de Langerhans (E. Laguesse 1893, in Compt. rend. hebdom. d. Séances et Mém. de la Soc. de Biol. XLV. 819): named after Paul Langerhans (1847–1888), German anatomist, who, in 1869, first described such islets] , any of numerous highly vascular islets of tissue in the pancreas, composed of light-staining cells of two principal types, one of which secretes insulin and the other glucagon; also elliptical. ΘΚΠ the world > life > biology > substance > [noun] > isolated or differentiated islet1851 island1879 the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > isolated piece of islet1851 the world > life > the body > secretory organs > gland > specific glands > [noun] > glands having gastric secretions > parts of pancreas islet (or Islet) of Langerhans1896 1851 W. B. Carpenter Man. Physiol. 164 The temporary Cartilages..are equally destitute of vessels when their mass is small; but if their thickness exceed an eighth of an inch, they are permeated by canals for the transmission of vessels. Still these vessels do not ramify with any minuteness in the tissue; and they leave large islets, in which the nutritive process must take place on the plan just described. 1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 499 Especially in their [the Caryophylleæ] rhizomes, thin-walled, long-celled parenchyma, often forming large irregular islets or annular segments, is inserted between fibrous masses of similar form. 1896 Jrnl. Royal Microsc. Soc. 35 Besides the solid buds which form the first ‘islets of Langerhans’, they give rise to numerous hollow buds. 1897 T. C. Allbutt et al. Syst. Med. III. 955 The ulceration is so extensive that only islets of mucous membrane are left here and there. 1898 T. C. Allbutt et al. Syst. Med. V. 204 Islets of spongy tissue separate the individual nodules [of tubercle]. 1904 Proc. Royal Soc. 73 84 The degeneration or absence of the islets in diabetes. 1910 Practitioner Jan. 32 Many other pathological conditions..have been ascribed to abnormalities of other ductless glands; e.g...glycosuria to the loss of the internal secretion formed by the islets of Langerhans in the pancreas. 1968 Times 27 Nov. 9/3 Those parts of the organ [sc. the pancreas] concerned with carbohydrate metabolism—known as the islets of Langerhans. 1973 Nature 23 Mar. 259 Yields of up to 350 Islets per rat pancreas have been achieved using this method. 3. attributive. ΚΠ 1810 W. Scott Lady of Lake iii. 99 Abrupt he paced the islet strand. 1861 Sat. Rev. 12 388/1 St. Helier, too, has its islet-castle, built by Queen Elizabeth. 1861 Sat. Rev. 12 388/2 An islet-breakwater. 1861 Sat. Rev. 12 389/1 An islet-rock. 1871 R. Ellis tr. Catullus Poems xxviii. 12 Was only this the plea Detain'd you in that islet angle of the west? 1877 J. C. Geikie Life & Words Christ I. xxix. 480 Constellations anchored on the vast expanse like tiny islet clusters on the boundless ocean. 1899 Westm. Gaz. 2 Oct. 10/1 Signalling from lightships and islet lighthouses to the mainland. 1914 E. A. Schäfer Introd. Study Endocrine Glands 84 The results of pancreas-extirpation and pancreas-grafting can..be best explained by supposing that the islet-tissue produces an autacoid substance which passes into the blood and affects carbohydrate metabolism and carbohydrate storage in such a manner that there is no undue accumulation of glucose in the blood. Provisionally it will be convenient for description purposes to refer to this hypothetical autacoid as insuline. 1927 J. B. S. Haldane & J. S. Huxley Animal Biol. xii. 279 Islet cell of human pancreas. 1962 Lancet 12 May 1003/2 The characteristics of the Zollinger–Ellison syndrome are extreme gastric hyper~secretion, intractable peptic ulceration..and either hyperplasia or tumour of the islet-cells of the pancreas. 1963 E. J. W. Barrington Introd. Gen. & Compar. Endocrinol. iii. 43 We have evidence that islet tissue arose very early in vertebrate evolution. 1965 J. Lee & F. Knowles Animal Hormones vii. 113 Occasionally in man a tumour of the islet cell occurs and there is excessive secretion of insulin. This entry has not yet been fully updated (first published 1900; most recently modified version published online December 2021). < n.a1552
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