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.