Sinistrorsal
Pronunciation : Sin`is*tror"sal
Part of Speech : a.
Etymology : [L.sinistrorsus, sinistroversus, turned toward the left side; sinister left + vertere, vortere, versum, vorsum, to turn.]
Definition : Defn: Rising spirally from right to left (of the spectator); sinistrorse.
Source : Webster's Unabridged Dictionary, 1913