No. Neuter is a general term. In common usage it's used for males, but it actually isn't just for males.
"Neutering, from the Latin neuter (of neither sex), is the removal of an animal's reproductive organ, either all of it or a considerably large part. "
"Neutering, from the Latin neuter (of neither sex), is the removal of an animal's reproductive organ, either all of it or a considerably large part. "
That being said yes it's common to use the term "neuter" to refer to castration but as sael pointed out it really only means "without gender" (ie GENDER NEUTRAL.)