submillimeter

[ suhb-mil-uh-mee-ter ]

adjective
  1. less than a millimeter in size: a submillimeter wave.

Origin of submillimeter

1
First recorded in 1950–55; sub- + millimeter

Words Nearby submillimeter

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use submillimeter in a sentence