Exogenous \Ex*og"e*nous\, a.

1. (Bot.) Pertaining to, or having the character of, an exogen; -- the opposite of endogenous.

2. (Biol.) Growing by addition to the exterior.

3. (Anat.) Growing from previously ossified parts; -- opposed to autogenous. --Owen.

Exogenous aneurism (Med.), an aneurism which is produced by causes acting from without, as from injury.

Source: Webster's Revised Unabridged Dictionary (1913)