The Collaborative International Dictionary
Opposability
Opposability \Op*pos`a*bil"i*ty\, n. The condition or quality of being opposable.
In no savage have I ever seen the slightest approach to
opposability of the great toe, which is the essential
distinguishing feature of apes.
--A. R.
Wallace.
Wiktionary
opposability
n. The condition or quality of being opposable.