menarche

n. the first incidence of menstruation in a female, marking the onset of puberty. The age at which menarche occurs varies among individuals and cultures: It tends to occur earlier in Western countries, possibly associated with better nutrition. —menarcheal adj.

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Psychology term of the day

December 18th 2024

perceptual segregation

the separation of one part of a perceptual field from the whole by physical boundaries or attention-diverting methods. See figure–ground.