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germ layer

any of the three layers of cells in an animal embryo at the gastrula stage, from which the various organs and tissues develop. The outermost layer is the ectoderm, the middle layer is the mesoderm, and the inner layer is the endoderm.

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Psychology term of the day

May 21st 2024

persona

persona

n. in the analytic psychology of Carl Jung, the public face an individual presents to the outside world, in contrast to more deeply rooted and authentic personality characteristics. This sense has now passed into popular usage. The term is taken from the mask worn by actors in Roman antiquity.