Dictionary.com
definitions
  • synonyms

submillimeter

[suhb-mil-uh-mee-ter]
adjective
  1. less than a millimeter in size: a submillimeter wave.
Show More

Origin of submillimeter

First recorded in 1950–55; sub- + millimeter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018