rhizoidadj.n.

Brit.

/ˈrʌɪzɔɪd/, U.S.

/ˈraɪˌzɔɪd/

Origin: A borrowing from Latin. Etymon: Latin rhizoides.

Etymology: < post-classical Latin rhizoides (1728 or earlier; from 1820s in scientific Latin as specific epithet) < ancient Greek ῥίζα root (see rhizo- comb. form) + classical Latin -oīdēs -oid suffix. Compare Hellenistic Greek ῥιζώδης like a root. In use as noun (sense B.) after German Rhizoid (1868 or earlier).

A. adj.

Resembling a root; (Microbiology) designating or exhibiting an irregularly branching pattern of colony growth.

ΘΚΠ

the world > plants > part of plant > root > [adjective] > of or belonging to root

tuberous1668

stemmy1728

radical1753

radicous?1764

radicellar1819

rhizoid1859

rhizomatic1864

rhizomic1898

rooty1905

stocky1915

1859 H. H. Higgins Synopsis & List Brit. Gasteromycetes in Proc. Lit. & Philos. Soc. Liverpool 13 App. 111 Peridium sub-globose, smooth, with a rhizoid base.

1904 Bull. Lab. Nat. Hist. State Univ. Iowa 5 233 The outer layer of this tissue forms a rind, some of the cells of which send out rhizoid or root-like hyphæ into the substratum below.

1953 R. W. Fairbrother Text-bk. Bacteriol. (ed. 7) xviii. 339 The American Committee has given the following features as indicating this group [sc. Bacillus]: aerobic forms; mostly saprophytes; liquefy gelatin; often occur in long threads and form rhizoid colonies; form of rod not greatly changed at sporulation.

1986 Bergey's Man. Systematic Bacteriol. II. 1117/2 On the medium described, B[acillus] fastidiosus usually forms colonies showing rhizoid outgrowths.

1994 Evolution 48 1698/1 This organism [sc. Bacillus mycoides] can be..identified unambiguously by its unique rhizoid colony morphology.

B. n.

Botany. A delicate root-like outgrowth (unicellular or multicellular) from the thallus of a cryptogam, esp. a bryophyte.

ΘΚΠ

the world > plants > part of plant > root > [noun] > rhizoid or hapteron

rhizula1832

rhizoid1874

hapteron1883

1874 Pop. Sci. Rev. 13 388 It attaches itself by means of rhizoids or root-hairs.

1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 317 In Atrichum and other Polytrichaceæ, the stouter rhizoids coil round one another.

1914 M. Drummond tr. G. Haberlandt Physiol. Plant Anat. v. 226 The trichomes in question..are endowed with the properties of typical root-hairs, but in addition possess many of the capacities of roots; in particular, rhizoids agree with roots in being sensitive to the influence of light, gravity and moisture, whereas genuine root-hairs are quite free from these forms of irritability.

1952 J. Clegg Freshwater Life Brit. Isles iv. 88 Stoneworts have no roots in the strict botanical sense, but root-like structures, or rhizoids, penetrate the mud and serve to anchor the plants.

1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 70 Roots are lacking in the Bryophyta, but in their place most possess delicate rhizoids.

1977 Nature 6 Jan. 46/1 In contrast to lichens and mosses, whose rhizines and rhizoids serve mainly for attachment, trees have root systems which transport sulphate upward.

2005 C. Tudge Secret Life Trees iii. 70 Bryophytes..have no proper roots, merely anchoring themselves by projecting ‘rhizoids’, which have no special role in absorbing nutrients and water.

Derivatives

rhiˈzoidal adj. Botany of the nature of a rhizoid; of, relating to, or consisting of rhizoids.

ΚΠ

1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 282 The rhizoidal tubes are segmented by only a few septa which lie far below the growing apex.

1956 New Biol. 20 113 The rhizoidal development of the moss Funaria affords a parallel to the root system of a higher plant.

2003 Taxon 52 12/1 Rhizoidal filaments are formed from the inner cortical cells, and become elongate and filamentous.

† rhizoideous adj. [compare scientific Latin rhizoideus (1813 or earlier)] Obsolete rare root-like.Apparently only attested in dictionaries or glossaries.

ΚΠ

1866 J. Lindley & T. Moore Treasury Bot. II. 974/1 Rhizoid, or Rhizoideous, resembling a root.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	rhizoid
释义	rhizoidadj.n. Brit. /ˈrʌɪzɔɪd/, U.S. /ˈraɪˌzɔɪd/ Origin: A borrowing from Latin. Etymon: Latin rhizoides. Etymology: < post-classical Latin rhizoides (1728 or earlier; from 1820s in scientific Latin as specific epithet) < ancient Greek ῥίζα root (see rhizo- comb. form) + classical Latin -oīdēs -oid suffix. Compare Hellenistic Greek ῥιζώδης like a root. In use as noun (sense B.) after German Rhizoid (1868 or earlier). A. adj. Resembling a root; (Microbiology) designating or exhibiting an irregularly branching pattern of colony growth. ΘΚΠ the world > plants > part of plant > root > [adjective] > of or belonging to root tuberous1668 stemmy1728 radical1753 radicous?1764 radicellar1819 rhizoid1859 rhizomatic1864 rhizomic1898 rooty1905 stocky1915 1859 H. H. Higgins Synopsis & List Brit. Gasteromycetes in Proc. Lit. & Philos. Soc. Liverpool 13 App. 111 Peridium sub-globose, smooth, with a rhizoid base. 1904 Bull. Lab. Nat. Hist. State Univ. Iowa 5 233 The outer layer of this tissue forms a rind, some of the cells of which send out rhizoid or root-like hyphæ into the substratum below. 1953 R. W. Fairbrother Text-bk. Bacteriol. (ed. 7) xviii. 339 The American Committee has given the following features as indicating this group [sc. Bacillus]: aerobic forms; mostly saprophytes; liquefy gelatin; often occur in long threads and form rhizoid colonies; form of rod not greatly changed at sporulation. 1986 Bergey's Man. Systematic Bacteriol. II. 1117/2 On the medium described, B[acillus] fastidiosus usually forms colonies showing rhizoid outgrowths. 1994 Evolution 48 1698/1 This organism [sc. Bacillus mycoides] can be..identified unambiguously by its unique rhizoid colony morphology. B. n. Botany. A delicate root-like outgrowth (unicellular or multicellular) from the thallus of a cryptogam, esp. a bryophyte. ΘΚΠ the world > plants > part of plant > root > [noun] > rhizoid or hapteron rhizula1832 rhizoid1874 hapteron1883 1874 Pop. Sci. Rev. 13 388 It attaches itself by means of rhizoids or root-hairs. 1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 317 In Atrichum and other Polytrichaceæ, the stouter rhizoids coil round one another. 1914 M. Drummond tr. G. Haberlandt Physiol. Plant Anat. v. 226 The trichomes in question..are endowed with the properties of typical root-hairs, but in addition possess many of the capacities of roots; in particular, rhizoids agree with roots in being sensitive to the influence of light, gravity and moisture, whereas genuine root-hairs are quite free from these forms of irritability. 1952 J. Clegg Freshwater Life Brit. Isles iv. 88 Stoneworts have no roots in the strict botanical sense, but root-like structures, or rhizoids, penetrate the mud and serve to anchor the plants. 1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 70 Roots are lacking in the Bryophyta, but in their place most possess delicate rhizoids. 1977 Nature 6 Jan. 46/1 In contrast to lichens and mosses, whose rhizines and rhizoids serve mainly for attachment, trees have root systems which transport sulphate upward. 2005 C. Tudge Secret Life Trees iii. 70 Bryophytes..have no proper roots, merely anchoring themselves by projecting ‘rhizoids’, which have no special role in absorbing nutrients and water. Derivatives rhiˈzoidal adj. Botany of the nature of a rhizoid; of, relating to, or consisting of rhizoids. ΚΠ 1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 282 The rhizoidal tubes are segmented by only a few septa which lie far below the growing apex. 1956 New Biol. 20 113 The rhizoidal development of the moss Funaria affords a parallel to the root system of a higher plant. 2003 Taxon 52 12/1 Rhizoidal filaments are formed from the inner cortical cells, and become elongate and filamentous. † rhizoideous adj. [compare scientific Latin rhizoideus (1813 or earlier)] Obsolete rare root-like.Apparently only attested in dictionaries or glossaries. ΚΠ 1866 J. Lindley & T. Moore Treasury Bot. II. 974/1 Rhizoid, or Rhizoideous, resembling a root. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < adj.n.1859
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