arsis

is, f.
I. 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.
Lewis & Short
A Latin Dictionary, 1879
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