[sin-uh-strawrs, si-nis-trawrs, sin-uh-strawrs] 
| (from a point of view at the center of the spiral) rising spirally in a counterclockwise manner, as a stem (opposed to dextrorse ). |
| sin·is·trorse (sĭn'ĭ-strôrs') adj. Growing upward in a spiral that turns from right to left: a sinistrorse vine. [Latin sinistrōrsus, turned toward the left, contraction of *sinistrōversus : sinistrō, toward the left, from ablative of sinister, left + vorsus, past participle of vortere, variant of vertere, to turn; see wer-2 in Indo-European roots.] sin'is·trorse'ly adv. |
əˌstrɔrs