Английский разговорный словарь (основной) - reciprocal

rɪˈsɪprəkəl adj. & n. --adj. 1 in return (offered a reciprocal greeting). 2 mutual (their feelings are reciprocal). 3 Gram. (of a pronoun) expressing mutual action or relation (as in each other). 4 inversely correspondent; complementary (natural kindness matched by a reciprocal severity). --n. Math. an expression or function so related to another that their product is unity (Ì is the reciprocal of 2). øøreciprocality n. reciprocally adv. [L reciprocus ult. f. reback + pro forward]