One of the mysteries of the English language finally explained.
Originally: = penaeoid. Later: a shrimp of the infraorder Penaeidea, which includes the penaeids.
Of or relating to penaeideans; of the nature of a penaeidean.
Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From scientific Latin Penaeidea, name of a family and later an infraorder + -an.
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