Breadcrumb Home > Thesaurus > T Synonyms of thulium Find synonyms for: Noun 1. thulium, Tm, atomic number 69, metallic element, metal usage: a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of thulium (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: hagiography Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language