Sĭn'is-tral, a.
a. 1. Pertaining, or inclining, to the left; sinistrous. 2. (Conch.) Having the turns of the spiral made to the left;—the same as reversed.
a. 1. Pertaining, or inclining, to the left; sinistrous. 2. (Conch.) Having the turns of the spiral made to the left;—the same as reversed.