|menə|lāəs(ə̇z)- noun
Usage: usually capitalized M
Etymology: after Menelaus, 1st century A.D. Greek geometer
: a theorem in geometry: if through a triangle ABC a transversal is drawn cutting the sides BC, AB, AC (produced if necessary) in the respective points p, q, r, then the product Aq×Bp×Cr is numerically equal to the product Bq×Cp×Ar