havn.
/hav/, U.S. /hæv/ Mathematics.
= haversine n.
ΚΠ
1842 H. W. Jeans Plane & Spherical Trigonom.: Pt. I 53 ½ log. hav. S..4·978000.
1899 Nature 19 Jan. 268/2 In the next chapter..[the reader] is immediately confronted with hav A = (vers A)/2 = (1 − cos A)/2, &c., without any previous hint as to what hav A or vers A means.
1958 Amer. Math. Monthly 65 523 May we be allowed to suggest at this point that..the latter be rewritten as a haversine formula, namely c2 = (a − b)2 + 4ab hav γ.
2013 G. Van Brummelen Heavenly Math. ix. 160 Altering the definition slightly by dividing by 2, hav θ = 1/ 2(1 − cos θ) = sin2θ/ 2.
This is a new entry (OED Third Edition, March 2015; most recently modified version published online March 2022).
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n.1842