sinistrorsal

From Latin sinistrorsus, sinistroversus (“turned toward the left side”), from sinister (“left”) + vertere, vortere, versum, vorsum (“to turn”).

sinistrorsal (not comparable)

1. Rising spirally from right to left (of the observer)

   sinistrorsal gyrations of a storm

   sinistrorsal shells

   sinistrorsal solenoid

2. (botany) sinistrorse.

• dextrorsal

• “sinistrorsal”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.