noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A tetragonal-ditetragonal dipyramidal deep purplish blue mineral containing aluminum, beryllium, hydrogen, oxygen, phosphorus, potassium, sodium, and zirconium.

Etymology

From Selwyn + -ite, after A. R. C. Selwyn.

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