English Dictionary

reciprocal

/ɹɪˈsɪpɹək(ə)l/

noun

(arithmetic) The number obtained by dividing 1 by another given number; the result of exchanging the numerator and the denominator of a fraction. / (grammar) A construction expressing mutual action.

They have a reciprocal relationship.

意味（1）

(arithmetic) The number obtained by dividing 1 by another given number; the result of exchanging the numerator and the denominator of a fraction.

0.5 is the reciprocal of 2.

意味（2）

(grammar) A construction expressing mutual action.

Depending on where reciprocalization applies (syntax vs. lexicon), the relevant reciprocal verbs are claimed to exhibit specific properties, in particular: (i) syntactic reciprocals are fully productive whereas lexical reciprocals have only limited productivity; […]