Gastraea

Definition of Gastraea

Gas`trae´a
n.1.(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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Gasometric
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Gasoscope
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Gasserian ganglion
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-Gastraea-
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Gastrocnemius
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