Zoology. A circular structure forming the end of some sponge spicules; = rotule, n. 2a. Also: a wheel-shaped spicule in the integument of certain…
| 单词 | θ33480 |
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > subphylum Eleutherozoa > class Holothurioidea > member of (sea-cucumber) > parts of > calcareous formation in integument (3) rotula1858 Zoology. A circular structure forming the end of some sponge spicules; = rotule, n. 2a. Also: a wheel-shaped spicule in the integument of certain… wheel-spicule1877 one of certain disk-shaped calcareous concretions, with an appearance of radiating spokes, in the skin of some holothurians; also, a wheel-shaped… rotule1882 Zoology. A circular structure forming the end of some sponge spicules, often convex and with a notched or hooked margin. Cf. rotula, n. 4b. |
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