Sinistral

1. Of, facing, or on the left side.
2. Left-handed.
3. (zoology, of certain spiral shells) Having the whorls of the spire revolving or rising to the left; reversed.
4. (geology) Having left lateral fault movement.

Synonyms

• (of, facing, or on the left side): sinistrous

Antonyms

• (of, facing, or on the left side): dextral