sinistrorse

adjective

sinis·trorse

¦sinə̇¦strȯ(ə)rs,

sə̇ˈniˌs-

variants or less commonly sinistrorsal

¦sinə̇¦strȯrsəl

of a plant : twining spirally upward around an axis from right to left:

: twining counterclockwise when the observer's point of view is within or above the spiral

: twining clockwise when the observer's point of view is outside the spiral compare dextrorse

: sinistral sense c

sinistrorsely

-slē

adverb

or less commonly sinistrorsally

-səlē

Word History

Etymology

sinistrorse from New Latin sinistrorsus, from Latin sinistrorsum, sinistrorsus toward the left side, from sinistr-, sinister left, on the left side + versus, past participle of vertere to turn; sinistrorsal from New Latin sinistrorsus + English -al