Talk:reciprocal

What is the grammatical definition of this word? Also, the first definition is really confusing, and I'm not sure what it's talking about. --Bookinvestor 06:29, 29 January 2008 (UTC)

(Mathematics) complementing
(Mathematics) serving to complement one another Reciprocal angles --Backinstadiums (talk) 09:15, 18 October 2020 (UTC)