[ ahr-sis ]
/ ˈɑr sɪs /

noun, plural ar·ses [ahr-seez] /ˈɑr siz/.

Music. the upward stroke in conducting; upbeat.Compare thesis(def 4).
  1. the part of a metrical foot that bears the ictus or stress.
  2. (less commonly) a part of a metrical foot that does not bear the ictus.Compare thesis(def 5).

Origin of arsis

1350–1400; Middle English: raising the voice < Latin < Greek, equivalent to ar- (stem of aírein to raise, lift) + -sis -sis Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for arsis

British Dictionary definitions for arsis

/ (ˈɑːsɪs) /

noun plural -ses (-siːz)

(in classical prosody) the long syllable or part on which the ictus falls in a metrical footCompare thesis (def. 6)

Word Origin for arsis

C18: via Late Latin from Greek, from airein to raise
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012