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The Collaborative International Dictionary
Oxycalcium

Oxycalcium \Ox`y*cal"ci*um\, a. [Oxy (a) + calcium.] Of or pertaining to oxygen and calcium; as, the oxycalcium light. See Drummond light.

Wiktionary
oxycalcium

a. (context dated English) Of, pertaining to, or produced by a combination of calcium (or lime) and oxygen