| 单词 | parazoan |
| 释义 | parazoan in British English (ˌpærəˈzəʊən) noun any multicellular invertebrate of the group Parazoa, which consists of the sponges (phylum Porifera) Compare metazoanWord origin C19: from parazoa, formed on the model of protozoa and metazoa, from para-1 + Greek zōon animalparazoan in American English (ˌpærəˈzoʊən) noun 1. any of the subkingdom (Parazoa) of animals, consisting only of the phylum of sponges, having two tissuelayers only and lacking a nervous system and true digestive cavity adjective 2. of the parazoans Word origin < ModL Parazoa: see para-1 & -zoa |
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