| sinistral | 1. Of or pertaining to the left, inclining to the left; sinistrous; opposed to dextral. 2. <zoology> Having the whorls of the spire revolving or rising to the left; reversed; said of certain spiral shells. Source: Websters Dictionary (01 Mar 1998) |
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| sinistrality | The condition of being left-handed. (05 Mar 2000) |