单词 | acontium |
释义 | acontiumnoun acon·ti·um ə-ˈkän-chē-əm plural acontia ə-ˈkän-chē-ə or acontiums zoology : one of the free threads continued from the lower ends of the septa of certain actinians, histologically similar to cnidoglandular bands, protruding through the mouth when the animal contracts, and probably defensive |
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