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onion snow

American

noun

Chiefly Pennsylvania.

a snowfall in late spring; the last snow of the season.

Etymology

Origin of onion snow

First recorded in 1900–05; (from crops having already been planted)

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.