conusn.

/ˈkəʊnəs/

Etymology: Latin conus cone n.¹

1. Anatomy. A conical structure or organ, e.g. in the heart, the conus arteriosus, the upper and anterior part of the right ventricle.

ΘΚΠ

the world > life > biology > physical aspects or shapes > shape > [noun] > cone or pyramid

pyramid1703

conus1885

1885 A. Sedgwick & F. G. Heathcote tr. C. Claus Elem. Text-bk. Zool.: Mollusca to Man 146 An independently pulsating part of the heart with rows of semi-lunar valves (conus arteriosus).

1886 W. N. Parker tr. R. Wiedersheim Elements Compar. Anat. 281 The longitudinal valve of the conus is incomplete.

1888 G. Rolleston & W. H. Jackson Forms Animal Life 76 The conus is separated from the ventricle by three valves.

1897 C. F. Cooper Parker & Haswell's Textbk. Zool. 84 A fourth chamber, the conus arteriosus, is added in front of the ventricle.

1907 Practitioner Oct. 466 The pulsation of the conus arteriosus is visible in the second or third interspaces.

1942 L. H. Hyman Compar. Vertebr. Anat. (ed. 2) xii. 313 In tetrapods..the conus becomes embraced by the bulges of the atrium.

1949 L. A. Adams & S. Eddy Compar. Anat. xii. 290 As the blood leaves the heart, it enters the conus arteriosus, a muscular structure containing valves that prevent the return of the blood to the heart.

1956 W. J. Hamilton Textbk. Human Anat. 712 The lower end of the spinal cord forms a blunt tapering extremity, the conus medullaris.

2. A pale crescentic or annular patch near the optic papilla resulting from atrophy of the choroid and exposure of the sclera, and found esp. in cases of myopia.

ΘΚΠ

the world > health and disease > ill health > a disease > disorders of eye > [noun] > other marks or spots

spot1340

maculaa1400

nubecula1699

feather1847

conus1886

siderosis1892

1886 Amer. Jrnl. Ophthalmol. Nov. 319 One of the appearances occasionally seen at the optic entrance—a form of conus so-called.

1886 Amer. Jrnl. Ophthalmol. Nov. 321 A full discussion of the ‘congenital conus’ would require a number of illustrations.

1887 A. H. Buck Ref. Handbk. Med. Sci. V. 89/2 The most common change seen in myopic eyes is the crescent or conus surrounding the optic papilla. This appears in the form of a crescentic white figure hugging the optic disk.

1938 S. Duke-Elder Text-bk. Ophthalmol. II. xxx. 1344 A congenital conus must be sharply differentiated from a myopic crescent.

1969 F. W. Newell Ophthalmol. (ed. 2) xvii. 282/1 A conus surrounding the entire disk may develop in glaucoma.

This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).

单词	conus
释义	conusn. /ˈkəʊnəs/ Etymology: Latin conus cone n.¹ 1. Anatomy. A conical structure or organ, e.g. in the heart, the conus arteriosus, the upper and anterior part of the right ventricle. ΘΚΠ the world > life > biology > physical aspects or shapes > shape > [noun] > cone or pyramid pyramid1703 conus1885 1885 A. Sedgwick & F. G. Heathcote tr. C. Claus Elem. Text-bk. Zool.: Mollusca to Man 146 An independently pulsating part of the heart with rows of semi-lunar valves (conus arteriosus). 1886 W. N. Parker tr. R. Wiedersheim Elements Compar. Anat. 281 The longitudinal valve of the conus is incomplete. 1888 G. Rolleston & W. H. Jackson Forms Animal Life 76 The conus is separated from the ventricle by three valves. 1897 C. F. Cooper Parker & Haswell's Textbk. Zool. 84 A fourth chamber, the conus arteriosus, is added in front of the ventricle. 1907 Practitioner Oct. 466 The pulsation of the conus arteriosus is visible in the second or third interspaces. 1942 L. H. Hyman Compar. Vertebr. Anat. (ed. 2) xii. 313 In tetrapods..the conus becomes embraced by the bulges of the atrium. 1949 L. A. Adams & S. Eddy Compar. Anat. xii. 290 As the blood leaves the heart, it enters the conus arteriosus, a muscular structure containing valves that prevent the return of the blood to the heart. 1956 W. J. Hamilton Textbk. Human Anat. 712 The lower end of the spinal cord forms a blunt tapering extremity, the conus medullaris. 2. A pale crescentic or annular patch near the optic papilla resulting from atrophy of the choroid and exposure of the sclera, and found esp. in cases of myopia. ΘΚΠ the world > health and disease > ill health > a disease > disorders of eye > [noun] > other marks or spots spot1340 maculaa1400 nubecula1699 feather1847 conus1886 siderosis1892 1886 Amer. Jrnl. Ophthalmol. Nov. 319 One of the appearances occasionally seen at the optic entrance—a form of conus so-called. 1886 Amer. Jrnl. Ophthalmol. Nov. 321 A full discussion of the ‘congenital conus’ would require a number of illustrations. 1887 A. H. Buck Ref. Handbk. Med. Sci. V. 89/2 The most common change seen in myopic eyes is the crescent or conus surrounding the optic papilla. This appears in the form of a crescentic white figure hugging the optic disk. 1938 S. Duke-Elder Text-bk. Ophthalmol. II. xxx. 1344 A congenital conus must be sharply differentiated from a myopic crescent. 1969 F. W. Newell Ophthalmol. (ed. 2) xvii. 282/1 A conus surrounding the entire disk may develop in glaucoma. This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018). < n.1885
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