glochidiumn.

/ɡləʊˈkɪdɪəm/

Forms: Plural glochidia

/ɡləʊˈkɪdɪə/.

Etymology: modern Latin: see glochidiate adj.

1. The larva of a pond-mussel of the family Unionidæ. Also attributive.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > section Asiphonida > family Unionidae > member of > larva of

glochidium1875

1875 T. H. Huxley & H. N. Martin Course Elem. Biol. 110 There is a single adductor muscle and a rudimentary foot, from which one or two long structureless filaments, representing the byssus of the sea-mussel, proceed. These byssal filaments become entangled with one another and tend to keep the ‘Glochidia’ in their places.

1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 137 This Glochidium is eventually set free from the parent.

1930 G. R. de Beer Embryol. & Evol. 44 The Glochidium larva of Unio.

1961 P. Street Shell Life on Seashore v. 78 Many fresh-water fish serve as hosts to these fresh-water glochidia.

2. Botany. (See quot. 1900.) (Also ˈglochid.)

ΘΚΠ

the world > plants > part of plant > hair or bristle > [noun]

hair1631

villus1704

bristle1759

striga1760

seta1793

glochidium1882

1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) ii. 454 In some species [of Azolla] these massulæ have their surfaces covered with hair-like appendages, barbed at their free ends (Glochidia).

1889 A. W. Bennett & G. R. M. Murray Handbk. Cryptogamic Bot. i. 30 In some species..the surface of these masses is covered with hair-like appendages, barbed at the apex, the glochids.

1900 B. D. Jackson Gloss. Bot. Terms Glochid, glochidium.., (1) a barbed hair or bristle; (2) a similar structure on the massulae of certain Cryptogams which act as organs of attachment to a macrospore.

1905 D. H. Campbell Struct. & Devel. Mosses & Ferns (ed. 2) xi. 417 Upon the outside of the massulæ are formed the curious anchor-like ‘glochidia’.

1938 G. M. Smith Cryptogamic Bot. II. ix. 360 Massulae of species belonging to the section Rhizosperma lack glochidia.

1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) iii. 582 Arising from the surface of each massula are a number of small, barbed hooks or glochidia.

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

单词	glochidium
释义	glochidiumn. /ɡləʊˈkɪdɪəm/ Forms: Plural glochidia /ɡləʊˈkɪdɪə/. Etymology: modern Latin: see glochidiate adj. 1. The larva of a pond-mussel of the family Unionidæ. Also attributive. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > section Asiphonida > family Unionidae > member of > larva of glochidium1875 1875 T. H. Huxley & H. N. Martin Course Elem. Biol. 110 There is a single adductor muscle and a rudimentary foot, from which one or two long structureless filaments, representing the byssus of the sea-mussel, proceed. These byssal filaments become entangled with one another and tend to keep the ‘Glochidia’ in their places. 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 137 This Glochidium is eventually set free from the parent. 1930 G. R. de Beer Embryol. & Evol. 44 The Glochidium larva of Unio. 1961 P. Street Shell Life on Seashore v. 78 Many fresh-water fish serve as hosts to these fresh-water glochidia. 2. Botany. (See quot. 1900.) (Also ˈglochid.) ΘΚΠ the world > plants > part of plant > hair or bristle > [noun] hair1631 villus1704 bristle1759 striga1760 seta1793 glochidium1882 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) ii. 454 In some species [of Azolla] these massulæ have their surfaces covered with hair-like appendages, barbed at their free ends (Glochidia). 1889 A. W. Bennett & G. R. M. Murray Handbk. Cryptogamic Bot. i. 30 In some species..the surface of these masses is covered with hair-like appendages, barbed at the apex, the glochids. 1900 B. D. Jackson Gloss. Bot. Terms Glochid, glochidium.., (1) a barbed hair or bristle; (2) a similar structure on the massulae of certain Cryptogams which act as organs of attachment to a macrospore. 1905 D. H. Campbell Struct. & Devel. Mosses & Ferns (ed. 2) xi. 417 Upon the outside of the massulæ are formed the curious anchor-like ‘glochidia’. 1938 G. M. Smith Cryptogamic Bot. II. ix. 360 Massulae of species belonging to the section Rhizosperma lack glochidia. 1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) iii. 582 Arising from the surface of each massula are a number of small, barbed hooks or glochidia. This entry has not yet been fully updated (first published 1933; most recently modified version published online September 2018). < n.1875
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