Breadcrumb Home > Thesaurus > L Synonyms of lanthanum Find synonyms for: Noun 1. lanthanum, La, atomic number 57, metallic element, metal usage: a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of lanthanum (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: miasma Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language