reciprocal course definition
â¢ RECIPROCAL (noun) The noun RECIPROCAL has 3 senses: 1. something (a term or expression or concept) that has a reciprocal relation to something else. 2. (mathematics) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2; the multiplicative inverse of 7 is 1/7. 3. hybridization involving a pair of crosses that reverse the sexes associated with each genotype. Familiarity information: RECIPROCAL used as a noun is uncommon.