leuconoidadj.n.
/ˈluːkənɔɪd/, U.S. /ˈlukəˌnɔɪd/ Zoology.
A. adj.
Of or resembling a leucon; designating a leucon.
ΘΚΠ
the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [adjective]
polystomatous1825
polystomous1848
polystome1859
poriferal1877
poriferan1877
leuconoid1894
1894 Q. Jrnl. Microsc. Sci. 35 v. 178 In this genus we meet for the first time with the well-known Leuconoid type of canal system.
1918 S. Hōzawa Rep. Calcareous Sponges 545 The canal system is leuconoid.
1968 P. Brien in M. Florkin & B. T. Scheer Chem. Zool. II. i. i. 7 The leuconoid rhagon, erect on its support, tends to grow bigger by the thickening of its mesenchyme.
2009 G. Karleskint et al. Introd. Marine Biol. (ed. 3) viii. 194/1 In some leuconoid sponges the number of chambers lined by collar cells may be enormous.
B. n.
A leuconoid sponge. Cf. leucon n. rare.
ΘΚΠ
the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of
sponge1538
spongiary1860
poriferan1864
leuconoid1911
1911 Encycl. Brit. XXV. 718/1 In the more complex Leuconoids..the process of colony formation becomes very irregular.
2001 R. S. K. Barnes et al. Invertebrates (ed. 3) iii. 47 (caption) The choanocytes..line cavities set within the wall, canals in the case of syconoids and pockets in the leuconoids.
This is a new entry (OED Third Edition, June 2010; most recently modified version published online March 2022).
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adj.n.1894