I. ˈsinə̇strəl, sə̇ˈnis- adjective
Etymology: Medieval Latin sinistralis, from Latin sinistr-, sinister left + -alis -al
: of or relating to the left : inclined to the left: as
a. : left-handed
b. of a flatfish : having the left side turned uppermost — opposed to dextral
c. of a gastropod shell : having the whorls 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
II. noun
( -s )
: a person exhibiting dominance of the left hand and eye : a typical left-handed individual
if you are left-handed and also definitely left-eyed … you are classified as a straight sinistral — Bob Nichols