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also peregrin, type of falcon, 1550s, short for peregrine falcon (late 14c.), from Old French faulcon pelerin (mid-13c.), from Medieval Latin falco peregrinus, from Latin peregrinus "coming from foreign parts" (see peregrination). Sense may have been a bird "caught in transit," as opposed to one taken from the nest. Peregrine as an adjective in English meaning "not native, foreign" is attested from 1520s.