Pronunciation: (u-rī'u-nidz, ôr"ē-ō'-, ōr"-), [key]
—n. (used with a pl. v.) Astron.
a collection of meteors comprising a meteor shower (Ori'onid me'teor show"er) visible during October, and having its apparent origin in the constellation Orion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.