blastula

n. a roughly spherical group of cells formed by division of the fertilized egg (zygote) during the early stages of embryonic development. It consists of a single layer of cells (the blastoderm) surrounding a fluid-filled cavity (the blastocele). In mammals, the blastula is called a blastocyst.

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Psychology term of the day

December 21st 2024

screening audiometry

rapid group measurement of audibility using a tone or tones of fixed level.