Breadcrumb Home > Dictionary > Index P parathyroid hormone: Meaning and Definition of Find definitions for: parathy'roid hor"mone Pronunciation: [key] — Biochem., Physiol. Biochem.,Physiol. a polypeptide hormone, produced in the parathyroid glands, that helps regulate the blood levels of calcium and phosphate. Abbr.: PTH Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. parathyroid gland para-toluidine TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: aficionado Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language