| 释义 |
blastoid, a. and n.|ˈblæstɔɪd|
[f. mod.L. Blastoidea, f. Gr. βλαστός sprout, germ + εἶδος form: see blasto- and -oid.]
A. adj. Of or belonging to the Blastoidea, a group of fossil echinoderms.
B. n. An echinoderm of this group.
1876Q. Jrnl. Geol. Soc. XXXII. 112 The Blastoid affinities of Astrocrinites (= Zygocrinus) have been pointed out. 1882Geikie Text-bk. Geol. iv. ii. 722 The blastoids or pentremites, which now took the place in the Carboniferous waters that in Silurian times had been filled by the Cystideans. 1914Brit. Mus. Return 202 Newly-described Blastoids from Somerset. 1962D. Nichols Echinoderms viii. 96 Tubercles have not been found in cystoids, blastoids and heterosteles. Ibid. xii. 149 The steganoblastidae are superficially blastoid-like. |