'calcitic' originates from New Latin, specifically the word 'calciticus', where the root 'calx' meant 'lime' or 'limestone' and the suffix '-itic' (from Greek '-itikos') meant 'pertaining to'.

'calcitic' changed from the Late Latin/New Latin term 'calciticus' and is formed in English from the mineral name 'calcite' (from Latin 'calx'), eventually becoming the adjective 'calcitic'.

Initially, it meant 'of or pertaining to lime/limestone', but over time it evolved into the modern sense 'relating to or composed of the mineral calcite (calcium carbonate)'.