Crossword Genius

Cosecant's reciprocal (4)

Ross

I believe the answer is:

sine

'cosecant's reciprocal' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for sine that I've seen before include "Latin tag for indefinitely - . . . . die" , "Indefinitely, with no appointed date - . . . . die" , "Indispensable condition" , "Trigonometric function" , "Trig function" .)

I've seen this clue in The New York Times, The Wall Street Journal and the LA Times.
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