1Of or on the right side or the right hand (the opposite of sinistral), in particular.
- Commonly there is a partitioning of sinistral and dextral criteria on alternate horizons, but horizons occur where both senses coexist.
- Zhang noted that both sinistral and dextral Pa and Pb elements differed entirely.
- It is interesting to speculate why most screw threads are dextral and only a relatively small number are sinistral threads.
- The literal-minded dextral dwarfs of the right-wing press are undone somewhat by irony and wit, especially since they believe they are uniquely blessed with a ‘sense of humour’.
- Rather, one form of the gene, which we may call D for dextral, may code for right-handedness, while the other allele, which we may call C for chance, leaves the direction of handedness to chance.
- Although sinistral individuals are known in many normally dextral species, left-handedness as a characteristic of species is rare in most gastropod clades.
1.2 Geology Relating to or denoting a strike-slip fault in which the motion of the block on the further side of the fault from an observer is toward the right.
- In fact, Aleksandrowski et al proposed that the complex was originally contiguous with the Northern Phyllite Zone in Germany and that dextral strike-slip fault movement translated this region southeastward to its present position.
- In this interpretation, the Troodos ophiolite formed to the east (in its current orientation) of a ridge-transform ridge intersection, in which the transform had a dextral offset and sinistral slip.
- In the northern Musgrave Block the Petermann Orogeny generated large-scale east-west-trending shear zones that accommodated dextral strike-slip and north- and south-directed thrusting.
1.3 Zoology (Of a spiral mollusk shell) with whorls rising to the right and coiling in a counterclockwise direction.
- There are dextral species, sinistral species, and a variable species (P. suturalis-see below) all within the same genus.
- In plan view, several specimens show minor changes in the generally linear orientation with either a sinistral or a dextral turn.
- Nevertheless, sinistral and dextral Pb elements are virtually mirror images, that is, they are more alike than the corresponding elements in L. variabilis.
- Example sentences
- Overall, then, there is no trend from dextrality to sinistrality.
- This tendency towards dextrality was explored further by examining a museum collection of extremities of walrus skeletons.
- It is possible that other commissural systems that transmit motor commands and thus influence dextrality may also manifest sexual orientation-related differences.
- Example sentences
- Both species described here are sinistrally coiled, but a similar pattern of ornamentation is present on two Pennsylvanian species that are dextrally coiled.
- Thus, the gerontic aperture of these dextrally coiled shells is situated on the left side in apertural view.
- Clockwise rotation of the trend of volcanic ridges is associated with dextrally offset, sinistrally slipping transforms, while anticlockwise rotation is associated with sinistrally offset, dextrally slipping transforms.
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