something (a term or expression or concept) that has a reciprocal relation to something else; "risk is the reciprocal of safety"
of or relating to the multiplicative inverse of a quantity or function; "the reciprocal ratio of a:b is b:a"
concerning each of two or more persons or things; especially given or done in return; "reciprocal aid"; "reciprocal trade"; "mutual respect"; "reciprocal privileges at other clubs"
the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen
a person or thing equal to another in value or measure or force or effect or significance etc; "send two dollars or the equivalent in stamps"
being essentially equal to something; "it was as good as gold"; "a wish that was equivalent to a command"; "his statement was tantamount to an admission of guilt"