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2 definitions found

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 Gna·thos·to·ma /nəˈθɑstəmə/ 名詞

From: Webster's Revised Unabridged Dictionary (1913)

 Gna·thos·to·ma n. pl.  Zool. A comprehensive division of vertebrates, including all that have distinct jaws, in contrast with the leptocardians and marsipobranchs (Cyclostoma), which lack them. [Written also Gnathostomata.]
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