The Collaborative International Dictionary
Sinistrorsal
Sinistrorsal \Sin`is*tror"sal\, a. [L. sinistrorsus, sinistroversus, turned toward the left side; sinister left + vertere, vortere, versum, vorsum, to turn.] Rising spirally from right to left (of the spectator); sinistrorse.
Wiktionary
sinistrorsal
a. rise spirally from right to left (of the observer); sinistrorse.
WordNet
sinistrorsal
adj. spiraling upward from right to left; "sinistrorse vines" [syn: sinistrorse]
Usage examples of "sinistrorsal".
Though the bean always insists on a sinistrorsal growth, as B, the hop prefers to climb in a dextrorsal manner, as A.