Hypertext Webster Gateway: "sinistral"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Sinistral \Sin"is*tral\, a.
1. Of or pertaining to the left, inclining to the left;
sinistrous; -- opposed to {dextral}.
2. (Zo["o]l.) Having the whorls of the spire revolving or
rising to the left; reversed; -- said of certain spiral
shells.
From WordNet (r) 1.7 (wn)
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"
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