Meaning : Of or on the right.
Example :
A dextral gastropod shell with the apex upward has its opening on the right when facing the observer.
A dextral flatfish lies with the right eye uppermost.
Of or on the left.
A sinistral gastropod shell with the apex upward has its opening on the left when facing the observer.Meaning : Preferring to use right foot or hand or eye.
Example :
Dextral individuals exhibit dominance of the right hand and eye.