si·nis·tral /ˈsɪnəstrəl, səˈnɪs-/
  (a.)左的,使用左手的,左旋的
  si·nis·tral /ˈsɪnəstrəl, səˈnɪs-/ 形容詞
  左側的,左利者,向左的,左利的,善用左手的,善用左手的人
  Sin·is·tral a.
  1. Of or pertaining to the left, inclining to the left; sinistrous; -- opposed to dextral.
  2. Zool. Having the whorls of the spire revolving or rising to the left; reversed; -- said of certain spiral shells.
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  sinistral
       adj 1: of or on the left; "a sinistral gastropod shell with the
              apex upward has its opening on the left when facing
              the observer"; "a sinistral flatfish lies with the
              left eye uppermost" [ant: dextral]
       2: preferring to use left foot or hand or eye; "sinistral
          individuals exhibit dominance of the left hand and eye"