noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A monoclinic-domatic light yellow mineral containing calcium, fluorine, niobium, oxygen, and silicon.

Etymology

Named for its composition of (NIO)bium and (CAL)cium, + -ite.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.