asconn.

Brit.

/ˈaskɒn/, U.S.

/ˈæskɑn/

Origin: A borrowing from German. Etymon: German Ascones.

Etymology: < German Ascones, the name of a ‘natural family’ of sponges (E. Haeckel 1871, in Jenaische Zeitschr. f. Med. u. Naturwissensch. 6 648) < ancient Greek ἀσκός bag, sac (see ascus n.) + -nes in German Leucones (see leucon n.) or Sycones (see sycon n.).

Zoology.

The simplest type of sponge structure, characterized by a tube- or bag-like cavity lined with flagellated cells (choanocytes); a stage in sponge development typified by this structure; a sponge of this type or stage. Frequently attributive. Cf. leucon n., sycon n. 2.

ΘΚΠ

the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > rhagon

ascon1881

leucon1881

rhagon1887

1873 W. S. Dallas tr. E. Häckel in Ann. & Mag. Nat. Hist. 11 424 D. IV. Natural system with average extension of the idea of species (in the fourth degree): three families (Ascones, Leucones, Sycones) with 21 genera.]

1881 Jrnl. Royal Miscrosc. Soc. 1 612 The Ascones appear to give rise to the Sycones, as Haeckel has said... It seems probable..that the entire Sycon is the equivalent of the primitive Ascon.

1932 L. A. Borradaile & F. A. Potts Invertebrata iii. 113 The three grades of sponge structure..are known as the ‘Ascon’, ‘Sycon’, and ‘Leucon’ grades.

1968 P. Brian in M. Florkin & B. T. Scheer Chem. Zool. II. i. i. 3 Throughout its thickness the wall of an ascon is crossed by..large contractile cells, perforated by an intracytoplasmic canal.

2004 J. W. Valentine Origin of Phyla vi. 203 Ascon and sycon architectures are rare, ascons being known only in the class Calcarea.

This is a new entry (OED Third Edition, June 2010; most recently modified version published online December 2021).

单词	ascon
释义	asconn. Brit. /ˈaskɒn/, U.S. /ˈæskɑn/ Origin: A borrowing from German. Etymon: German Ascones. Etymology: < German Ascones, the name of a ‘natural family’ of sponges (E. Haeckel 1871, in Jenaische Zeitschr. f. Med. u. Naturwissensch. 6 648) < ancient Greek ἀσκός bag, sac (see ascus n.) + -nes in German Leucones (see leucon n.) or Sycones (see sycon n.). Zoology. The simplest type of sponge structure, characterized by a tube- or bag-like cavity lined with flagellated cells (choanocytes); a stage in sponge development typified by this structure; a sponge of this type or stage. Frequently attributive. Cf. leucon n., sycon n. 2. ΘΚΠ the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > rhagon ascon1881 leucon1881 rhagon1887 1873 W. S. Dallas tr. E. Häckel in Ann. & Mag. Nat. Hist. 11 424 D. IV. Natural system with average extension of the idea of species (in the fourth degree): three families (Ascones, Leucones, Sycones) with 21 genera.] 1881 Jrnl. Royal Miscrosc. Soc. 1 612 The Ascones appear to give rise to the Sycones, as Haeckel has said... It seems probable..that the entire Sycon is the equivalent of the primitive Ascon. 1932 L. A. Borradaile & F. A. Potts Invertebrata iii. 113 The three grades of sponge structure..are known as the ‘Ascon’, ‘Sycon’, and ‘Leucon’ grades. 1968 P. Brian in M. Florkin & B. T. Scheer Chem. Zool. II. i. i. 3 Throughout its thickness the wall of an ascon is crossed by..large contractile cells, perforated by an intracytoplasmic canal. 2004 J. W. Valentine Origin of Phyla vi. 203 Ascon and sycon architectures are rare, ascons being known only in the class Calcarea. This is a new entry (OED Third Edition, June 2010; most recently modified version published online December 2021). < n.1881
随便看	doublehanded doublehandedness doublehatch doublehead doubleheaded doubleheaded serpent doubleheaded shot doubleheaded snake doubleheader doubleheaders doubleheading doublehearted doubleheartedness doublehorned doublehung doubleiron doubleironed doublejee doublejointed doublejointedness doublekeeled doublekey doubleknit doubleknitted doublelanted