[ pahy-ruh-klawr, -klohr ]
/ ˈpaɪ rəˌklɔr, -ˌkloʊr /
a mineral, chiefly composed of niobates of the cerium metals, occurring in syenites in the form of brown crystals.
Origin of pyrochlore
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019