Definify.com
Webster 1913 Edition
Extensor
Ex-ten′sor
,Noun.
[L., one who stretches. See
Extend
.] (Anat.)
A muscle which serves to extend or straighten any part of the body, as an arm or a finger; – opposed to
flexor
. Webster 1828 Edition
Extensor
EXTENS'OR
,Noun.