(programming) An operator taking three operands, specifically the operator ?: used in many programming languages to select one of two values depending on a third value.

plural of ternary operator

plural of binary operator

(Canada) An illegal marijuana-growing operation, usually indoors.

plural of grow operation

(arithmetic) Any of the four basic operators in arithmetic, namely addition, subtraction, multiplication and division.

(calculus) A differential operator that preserves mathematical smoothness.

plural of operating theatre

plural of operating room

In the work (already) cited or quoted. Used, typically in footnotes and endnotes, to cite in an abbreviated form a source that has been cited previously; frequently abbreviated as op. cit.