Breadcrumb Home > Thesaurus > P Synonyms of polygraph Find synonyms for: Noun 1. polygraph, medical instrument usage: a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration) WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of polygraph (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: parallax Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language