arsis, is, f., = ἄρσις, in metre,
the elevation of the voice; opp. thesis, depression (in pure Lat., sublatio, Diom. p. 471 P.), Mart. Cap. 9, p. 328; Don. p. 1738 P.; cf. Ter. Maur. p. 2412 P., and Mar. Vict. p. 2482 P.
·noun That elevation of voice now called metrical accentuation, or the rhythmic accent. II. Arsis ·...
Webster's Dictionary of the English Language