Breadcrumb Home > Thesaurus > P Synonyms of preclinical Find synonyms for: Adjective1. preclinical, presymptomaticusage: of or relating to the early phases of a disease when accurate diagnosis is not possible because symptoms of the disease have not yet appearedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of preclinical (Dictionary) ✖ Related Content Daily Word Quiz: legerdemain Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language