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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 gas·traea /gæˈstriə/
 原腸幼蟲

From: Webster's Revised Unabridged Dictionary (1913)

 Gas·træ·a n.  Biol. A primeval larval form; a double-walled sac from which, according to the hypothesis of Haeckel, man and all other animals, that in the first stages of their individual evolution pass through a two-layered structural stage, or gastrula form, must have descended.  This idea constitutes the Gastræa theory of Haeckel. See Gastrula.
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