单词 | metastoma |
释义 | ‖ metastoma Zool.|mɛˈtæstəmə| Also anglicized metastome |ˈmɛtəstəʊm|. [mod.L., f. Gr. µετα- meta- + στόµα mouth.] 1. The labium or lower lip of crustaceans.
1859Huxley in Brit. Org. Rem., 1st Monograph 16 The Metastoma [in Pterygotus]..is an oval plate with margins much thinner than the centre. 1876Page Adv. Text-bk. Geol. xii. 210 A broad heart-shaped metastome or mouthpiece. 2. Haeckel's term (1872) for the secondary (i.e. permanent) mouth in the vertebrata.
1879tr. Haeckel's Evol. Man II. 469. |

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