archaeostomatous definition

  • adjective:
    • Applied to a gastrula whenever blastopore cannot totally open.
    • put on a gastrula as soon as the blastopore cannot totally close up.
    • Applied to a gastrula when the blastopore cannot completely open.
    • put on a gastrula as soon as the blastopore will not totally close up.
  • others:
    • Related To or obtaining the characters of this Archæostomata.
    • In biology, having a primitive blastopore or original orifice of invagination of a blastosphere which has undergone gastrulation; retaining an archenteric aperture, as distinguished from any other which may be acquired by a deuterostomatous gastrula: it is the usual state of those gastrulæ which are formed by emboly.
    • regarding or obtaining the characters of the Archæostomata.
    • In biology, having a primitive blastopore or original orifice of invagination of a blastosphere with withstood gastrulation; retaining an archenteric aperture, as distinguished from any other which may be acquired by a deuterostomatous gastrula: this is the normal state of these gastrulæ that are created by emboly.
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