gastraea
Gastraea is a 8 letter word which starts with the letter G and ends with the letter A for which we found 1 definitions.
| Definition |
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| (n.) 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 Gastraea theory of Haeckel. See Gastrula. |
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