noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An opaque, earthy variety of barite, or heavy spar. archaic, countable, uncountable

Etymology

British dialect cauk (“limestone”), from Northern Middle English calke, from Anglian Old English calc; doublet of calx and chalk.

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