| 单词 | hydrozoan |
| 释义 | hydrozoan /huy'dreuh zoh"euhn/, n. 1. any freshwater or marine coelenterate of the class Hydrozoa, including free-swimming or attached types, as the hydra, in which one developmental stage, either the polyp or medusa, is absent, and colonial types, as the Portuguese man-of-war, in which both medusa and polyp stages are present in a single colony. adj. 2. belonging or pertaining to the Hydrozoa. [1875-80; < NL Hydrozo(a) (see HYDRO-1, -ZOA) + -AN] |
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