haversine

[ hav-er-sahyn ]
/ ˈhæv ərˌsaɪn /

noun Trigonometry.

one half the versed sine of a given angle or arc.

Origin of haversine

First recorded in 1870–75; ha(lf) + ver(sed) + sine

British Dictionary definitions for haversine

haversine
/ (ˈhævəˌsaɪn) /

noun

obsolete half the value of the versed sine

Word Origin for haversine

C19: combination of half + versed + sine 1