sinistrorse
adjective
sinis·trorse
¦sinə̇¦strȯ(ə)rs,
sə̇ˈniˌs-
variants or less commonly sinistrorsal
¦sinə̇¦strȯrsəl
1
of a plant : twining spirally upward around an axis from right to left:
a
: twining counterclockwise when the observer's point of view is within or above the spiral
b
: twining clockwise when the observer's point of view is outside the spiral compare dextrorse
2
: sinistral sense c
sinistrorsely adverb
-slē
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