| 单词 | cetacean |
| 释义 | cetacean n. & adj. --n any marine mammal of the order Cetacea with streamlined hairless body and dorsal blowhole for breathing, including whales, dolphins, and porpoises. --adj of cetaceans. Derivatives cetaceous adj. Etymology: mod.L Cetacea f. L cetus f. Gk ketos whale |
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