adjective Date: 1803 of, relating to, or inclined to the left: as a. left-handed b. of a gastropod shell having the whorls coiling counterclockwise down the spire when viewed with the apex toward the observer and having the aperture situated on the left of the axis when held with the spire uppermost and with the aperture opening toward the observer — compare dextral b

New Collegiate Dictionary. 2001.

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  • sinistral — late 15c., “unlucky,” from O.Fr. sinistral or M.L. *sinistralis, from sinister (see SINISTER (Cf. sinister)). Meaning “on the left side” is from 1803. Related: Sinistrally …   Etymology dictionary

  • Sinistral — Sin is*tral, a. 1. Of or pertaining to the left, inclining to the left; sinistrous; opposed to {dextral}. [1913 Webster] 2. (Zo[ o]l.) Having the whorls of the spire revolving or rising to the left; reversed; said of certain spiral shells. [1913… …   The Collaborative International Dictionary of English

  • sinistral — [sin′is trəl] adj. [OFr < L sinistra, left hand: see SINISTER] 1. on the left hand side; left 2. left handed 3. having whorls that rise to the apex in clockwise spirals from the opening at the lower left: said of the shells of some gastropods …   English World dictionary

  • sinistral — counterclockwise coun ter*clock wise adj. & adv. in the opposite direction to that in which the hands of a clock rotate, as viewed from in front of the clock face; of rotatory motion or spiral direction. Opposite of {clockwise}, or {right handed} …   The Collaborative International Dictionary of English

  • sinistral — 1. Relating to the left side. SYN: sinistrous. 2. Denoting a left handed person. * * * si·nis·tral sin əs trəl, sə nis adj of, relating to, or inclined to the left esp LEFT HANDED sinistral n a person exhibiting dominance of the l …   Medical dictionary

  • Sinistral and dextral — Not to be confused with Dexter and sinister. Sinistral and dextral are scientific terms that describe chirality (“handedness”) or relative direction in a number of disciplines. The terms are derived from the Latin words for “left” (sinister) and… …   Wikipedia

  • sinistral — left; referring to flatfishes having the left hand side uppermost …   Dictionary of ichthyology

  • sinistral — adj. [L. sinistra, left] Pertaining to the left; to the left of the median line …   Dictionary of invertebrate zoology

  • sinistral — sinistrally, adv. /sin euh streuhl/, adj. 1. of, pertaining to, or on the left side; left (opposed to dextral). 2. left handed. 3. (of certain gastropod shells) coiling counterclockwise, as seen from the apex. [1425 75; late ME < ML sinistralis.… …   Universalium

  • sinistral — adjective a) Of, facing, on on the left side. b) Left handed. Syn: sinistrous Ant: dextral See Also: sinister …   Wiktionary

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