(archaic) The act of opening. / (archaic) An opening; an aperture.

plural of apertion

(archaic) open; uncovered; revealed

(archaic) openness; frankness

plural of apertive

(medicine) Causing the body to open; dissolving blockages or having a purgative or diuretic effect. / Pertaining to or using an aperture; apertural. / Tending to open.

A substance that can be used medicinally for its apertive effect.

(teratology) A form of acrocephalosyndactyly.