Equate v. t. (past & past part. equated; pres. part. equating) To make equal; to reduce to an average; to make such an allowance or correction in as will reduce to a common standard of comparison; to reduce to mean time or motion; as, to equate payments; to equate lines of railroad for grades or curves; equated distances. "Palgrave gives both scrolle and scrowe and equates both to F(rench) rolle."
Equating for grades (Railroad Engin.), adding to the measured distance one mile for each twenty feet of ascent.
Equating for curves, adding half a mile for each 360 degrees of curvature.