Astraean :: Astraean (a.) Pertaining to the genus Astraea or the family Astraeidae.

Astraean :: Astraean (n.) A coral of the family Astraeidae; a star coral.

Gastraea :: Gastraea (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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