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subatom

American

[suhb-at-uhm] / sʌbˈæt əm /

noun

Chemistry.

any component of an atom.

Etymology

Origin of subatom

First recorded in 1875–80; sub- + atom

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.