haversine

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Related to haversin: Haversian canal

haversine

(ˈhævəˌsaɪn)
n
(Mathematics) obsolete half the value of the versed sine
[C19: combination of half + versed + sine1]
References in periodicals archive ?
2]), sphere radius R, and distance (between A and B)d, haversin (d/R) = haversin ([DELTA][phi]) + cos [[phi].