Definition of sinistral
: of, relating to, or inclined to the left: asa : left-handedb 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
First Known Use of sinistral
Medical Definition of sinistral
: a person exhibiting dominance of the left hand and eye : a left-handed person
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