/ Thesaurus Find synonyms for: Noun1. Yerkes, Robert M. Yerkes, Robert Mearns Yerkesusage: United States psychologist who studied the intelligence of primates (1876-1956)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.See also: yerkes (Dictionary) Related Content Daily Word Quiz: chicory Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language Synonyms Index