| 单词 | cnidarian |
| 释义 | cnidarian (once / 3939771 pages) n WORD FAMILY cnidarian USAGE EXAMPLESDepending on the species of cnidarian and the type of stinging capsule, this attack can be barely perceptible or intensely painful. New York Times(Feb 12, 2014) Your typical cnidarian does not, after all, appear to have much in common with a human being. New York Times(Nov 28, 2012) The colony-forming cnidarian Gerardia was frequently identified outside the submersible. Science Magazine(Sep 07, 2012) n radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms Syn|Hypo|Hyper coelenterate polyp one of two forms that coelenterates take (e.g. a hydra or coral): usually sedentary with a hollow cylindrical body usually with a ring of tentacles around the mouth medusa, medusan, medusoidone of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles jellyfishany of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans scyphozoanany of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle hydroid, hydrozoancolonial coelenterates having the polyp phase dominant actinozoan, anthozoansessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed planulathe flat ciliated free-swimming larva of hydrozoan coelenterates Aeginasmall medusa Chrysaora quinquecirrhaa type of jellyfish hydrasmall tubular solitary freshwater hydrozoan polyp siphonophorea floating or swimming oceanic colony of polyps often transparent or showily colored sertularianfeathery colony of long-branched stems bearing stalkless paired polyps anemone, sea anemonemarine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton sea penfleshy featherlike warm-water colonies coralmarine colonial polyp characterized by a calcareous skeleton; masses in a variety of shapes often forming reefs invertebrate any animal lacking a backbone or notochord; the term is not used as a scientific classification |
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