Absciss

ab′sis, Absci a , ab-sis′sa, n. the straight line cut off or intercepted between the vertex of a curve and an ordinate, measured along the principal axis:— pl. Absci ′es , Absci ′æ , Absci ′as . [L. absci us , cut off, pa.p. of abscindĕre — ab , from, scindĕre , to cut.]