Sinistrorse

[sinistrɒ:s]

(adj.) spiraling upward from right to left; 'sinistrorse vines' .

Typed by Bartholdi--From WordNet

(a.) Turning to the left (of the spectator) in the ascending line; -- the opposite of dextrorse. See Dextrorse.

Checker: Sinclair

adj. rising from left to right as a spiral line.—Also Sinistrors′al.

Checked by Delores