plesiastern.

Brit.

/ˌpliːsɪˈastə/, U.S.

/ˌplisiˈæstər/

Origin: Formed within English, by derivation. Etymons: plesio- comb. form, -aster suffix.

Etymology: < plesio- comb. form + -aster suffix.

Zoology.

A sponge spicule in which a number of spines radiate from a short straight axis at the centre.

ΘΚΠ

the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > sponge spicule > having short axis

plesiaster1888

1888 W. J. Sollas in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXV. p. lxiii The plesiasters are always much larger when fully grown than the metasters,..and the metasters are larger than the spirasters; the three forms present a perfect gradational series.

1924 Proc. Royal Soc. B. 97 243 There is a progressive diminution in size from the plesiasters to the spirasters.

1998 Systematic Biol. 47 354 (caption) Plesiaster from Poecillastra compressa.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	plesiaster
释义	plesiastern. Brit. /ˌpliːsɪˈastə/, U.S. /ˌplisiˈæstər/ Origin: Formed within English, by derivation. Etymons: plesio- comb. form, -aster suffix. Etymology: < plesio- comb. form + -aster suffix. Zoology. A sponge spicule in which a number of spines radiate from a short straight axis at the centre. ΘΚΠ the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > sponge spicule > having short axis plesiaster1888 1888 W. J. Sollas in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXV. p. lxiii The plesiasters are always much larger when fully grown than the metasters,..and the metasters are larger than the spirasters; the three forms present a perfect gradational series. 1924 Proc. Royal Soc. B. 97 243 There is a progressive diminution in size from the plesiasters to the spirasters. 1998 Systematic Biol. 47 354 (caption) Plesiaster from Poecillastra compressa. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.1888
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