1. Plural of calx; the crumbly residue left after a mineral or metal has been heated or burned.
Usage: chemistry; technical
2. Plural of calx; the heel bone or heel of the foot in anatomy.
Usage: anatomy; medical

Examples

• The chemist collected the calxes produced by heating the metal compounds.
• In anatomy class, we learned that the calxes are the largest bones in the foot.
• After burning the limestone, the calxes were analyzed for their mineral composition.
• The patient's calxes were examined during the orthopedic assessment.
• Different metals produce different colored calxes when oxidized.