Sin'/is-trōr'/sal, a.
a. [Lat. sinistrorsus, sinistroversus, toward the left side, from sinister, left, and vertere, vortere, versum, versum, to turn.] Rising from left to right, as a spiral line, or helix.
a. [Lat. sinistrorsus, sinistroversus, toward the left side, from sinister, left, and vertere, vortere, versum, versum, to turn.] Rising from left to right, as a spiral line, or helix.