| 释义 |
Cnidaria, n. Zool.|nɪˈdɛːrɪə, naɪˈdɛːrɪə, kn-|
[mod.L. (coined in Fr. in Milne Edwards & Haine Hist. Nat. des Coralliaires (1857) I. ii. 94), f. Gr. κνίδη nettle + L. -āria, pl. of -ārium -ary1.]
A phylum of aquatic invertebrates (cnidarians) typically having a simple tube-shaped or cup-shaped body, which includes sea anemones, hydras, jellyfish, and corals; the Coelenterata (as now understood).
1884Sedgwick & Heathcote tr. C. Claus Elem. Text-bk. Zool. vii. 222 The Cnidaria represent the Cœlenterata in a more restricted sense. 1910Encycl. Brit. XIV. 172/2 In this way is formed a ring of tentacles, the most characteristic feature of the Cnidaria. 1940L. H. Hyman Invertebrates I. v. 252 The three lowest metazoan phyla, the Porifera, the Cnidaria, and the Ctenophora, are commonly stated to have remained at the gastrular level of construction. 1987Laverack & Dando Lect. Notes Invertebr. Zool. (ed. 3) iv. 30/1 Cnidaria..possess nematocysts, special cell organelles used for offence and defence, located in cnidoblast cells of epidermis and gastrodermis. |