noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The optical phenomenon in some coloured, transparent crystals (such as tourmaline and opal) in which the colour changes when viewed from different directions. countable, uncountable
2. 2
   the phenomenon of different colors appearing when certain crystals are viewed from different directions wordnet
3. 3
   The presence of various colours in the cell wall. countable, uncountable

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