/ Thesaurus / P Synonyms of picometre Find synonyms for: Noun1. picometer, picometre, micromicron, metric linear unitusage: a metric unit of length equal to one trillionth of a meterWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language