Obs. [ad. L. apertiōn-em, n. of action f. aperīre to open: see APERIENT.]
1. The action of opening.
1615. Crooke, Body of Man, 379. Anastomosis or inoculation or apertion and opening of two vessels one into another.
1743. trans. Heister’s Surg., 353. The Apertion of an Artery with a sharp Instrument.
2. An opening, an aperture.
1599. A. M., trans. Gabelhouer’s Bk. Physic, 12/1. Make a little apertion in the one end of the Egge, and let the water runne therout.
1624. Wotton, Archit., in Reliq. (1672), 17. Apertions, under which term I do comprehend Doors, windows … or other Conducts.
1684. trans. Bonet’s Merc. Compit., I. 4. You may make the apertion as long and deep as the malady and your curiosity require.
3. Openness (in sound). Cf. APERT 1 b. rare.
1668. Wilkins, Real Char., I. iv. § 5. 17. The Vowels ought to have something answerable in their Character unto the several kinds of Apertion which they have in their sound.
