a. Trig. [f. CO- pref. 4 + VERSED a.] In Co-versed sine: the versed sine of the complement of an angle (see VERSED).
1706. Phillips (ed. Kersey), Co-versed Sine (in Geom.) is the remaining part of the Diameter of a Circle after the Versed Sine is taken from it.
1782. Hutton, in Phil. Trans., LXXIV. 32. The difference between radius and sine will be the co-versed sine.
