Obs. or arch. [ad. L. accensiōn-em, n. of action, f. accend-cre, accens-us: see ACCEND.] The action of kindling or the state of being kindled; ignition; inflammation; heat.
1646. Sir T. Browne, Pseud. Ep., 88. From Small-coal ensueth the black colour and quick accension.
1673. Phil. Trans., VIII. 6170. What remedies are proper for the Blood, to mend its defective or excessive accension.
1729. Shelvocke, Artillery, III. 148. The great quantity of windy Exhalation, produced by the accension of the Salpeter.
1801. W. Taylor, in Monthly Mag., II. 645. This machine may facilitate the admixture and accension of the airs.