Turned or twisted to the left. ... Origin: L. Sinistrorsus, on the left side, fr. Sinister, left, + verto, pp. Versus, to turn ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973
Sin'is·trorse` adjective [ See Sinistrolsal .] Turning to the left (of the spectator) in the ascending line; -- the opposite of dextrorse . See Dextrorse . Found on http://www.encyclo.co.uk/webster/S/107