One of the mysteries of the English language finally explained.
1Of or on the left side or the left hand.Tthe opposite of dextral
left-hand, at nine o'clockView synonyms
- ‘Nevertheless, sinistral and dextral Pb elements are virtually mirror images, that is, they are more alike than the corresponding elements in L. variabilis.’
- 1.1 Left-handed.
- ‘Although sinistral individuals are known in many normally dextral species, left-handedness as a characteristic of species is rare in most gastropod clades.’
- 1.2Geology Relating to or denoting a strike-slip fault in which the motion of the block on the opposite side of the fault from an observer is toward the left.
- ‘In conclusion, the geological characteristics of the South China Sea cannot be explained by a pull-apart model involving a releasing bend of a sinistral strike-slip fault.’
- ‘The temporal distribution of first appearances of sinistral clades as documented by fossils generally differs from that of clades with a labral tooth.’
- ‘Although data on vertical displacement on the Klima fault zone are limited, the horizontal component is clearly much larger, and the Klima fault zone represents a sinistral strike-slip fault.’
- ‘Deposition of the unconformably overlying Red Bay Group was terminated in latest Lochkovian times by renewed sinistral strike-slip faulting.’
- ‘This paper tentatively identifies two lineaments and a fault that may relate to sinistral strike-slip faulting in the pre-Paradox Formation basement beneath Upheaval Dome.’
- 1.3Zoology (of a spiral mollusk shell) with whorls rising to the left and coiling in a clockwise direction.
- ‘These gastropods have slender, high-spired, multiwhorled shells bearing a sinistral protoconch and were united by Knight in the family Streptacididae.’
- ‘The latter species has a smooth, valvatiform, dextrally coiled teleoconch and a sinistral, anastrophic (coaxial heterostrophic) protoconch.’
- ‘If the umbilicate side is directed downward and the flat side upward, this gives the impression the shell is sinistral or a left-handed spiral, because the aperture when held toward the observer is on the left.’
- ‘This protoconch is discoidal or almost dicoidal and sinistral.’
- ‘The unusual change in shell coiling from dextral to sinistral during their ontogeny represents a character which makes their recognition in the fossil record easy.’
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