sinistral

[Eng. sinister; -al.] *1. Ord. Lang .: Of or pertaining to the left hand; inclining to the left hand; sinistrous. 2. Zool. ( of a shell): Having a spire turning to the left hand; reverse, as Physa and Clausilia. sin-Is-tral-1-ty, s . [Eng. sinistral; -ity .] The state or condition of being sinistral. sin-Is-tral-ly, adv. [Eng. sinistral; -ly.] On the left hand; from left to right.