Definition of gamma moth
: a migratory European noctuid moth (Plusia gamma) having a bright silvery Y-shaped mark on each of the forewings and a larva that feeds on the cabbage and other vegetables —called also silver Y moth
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Origin and Etymology of gamma moth
New Latin gamma (specific epithet of Plusia gamma), from Late Latin, third letter of the Greek alphabet; from the likeness in shape of the marks on the forewings to small gammas
First Known Use: 1799See Words from the same year
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