Either "captive-bred" or "captive-born"; the former meaning is probably more
common.

The issue is this: Herps offered for sale may have been collected from the
wild, or they may have been hatched/born in captivity.  (There are very strong
reasons to prefer to purchase the latter kind, but that's not the subject of
this question.)  An animal that was conceived and born in captivity is said
to be captive-*bred*.  If, however, a female herp is imported from the wild
and lays eggs shortly thereafter (having done her actual breeding before being
captured), the offspring are captive-*born*.

Animals that are "merely" captive-born are, in a sense, taken from the wild
population (though most of them probably would not have survived to adulthood
in the wild), but they enjoy most of the same health benefits that accrue to
captive-bred individuals.

When breeders offer "CB" animals for sale, they *usually* mean captive-bred.
This is by no means certain, however, especially with certain species that are
rarely bred in captivity.  If you're buying a CB animal from a breeder, and
you have strong feelings against buying a captive-born animal, go ahead and
ask.  Note that pet stores, especially corporate chain stores, sometimes have
no idea of their animals' origins, and once in a while they will just make up
an answer if you ask!  (I figured this out when a guy told me that a Surinam
toad---a South American species---had been imported from Africa...)