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ectoderm

n. the outermost of the primary germ layers of a developing embryo. Structures derived from ectoderm include skin and nails, hair, glands, mucous membranes, the nervous system, and external sense organs (e.g., ears, eyes). —ectodermal adj.

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Psychology term of the day

December 24th 2024

social maturity

social maturity

a level of behavior in accordance with the social standards that are the norm for individuals of a particular age.