exogenous

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Biology Derived or developed from outside the body; originating externally.
2. adj. Botany Characterized by the addition of layers of woody tissue.
3. adj. Medicine Having a cause external to the body. Used of diseases.

Century Dictionary and Cyclopedia

1. Growing by additions on the outside; specifically, in botany, belonging to or characteristic of the class of exogens.
2. Produced on the outside, as the spores of hyphomycetous and many other fungi; growing out from some part: specifically applied in anatomy to those processes of a vertebra which have no independent ossific centers of their own, but are mere outgrowths.
3. In geology, applied by Von Humboldt to extrusive, volcanic rocks, in contrast to endogenous rocks. See endogenous, 3.

Wiktionary

1. adj. biology produced or originating outside of an organism
2. adj. medicine of a disease: having an external cause
3. adj. economics of information: received from outside a group
4. adj. economics descriptive of a group created by public as opposed to private information

GNU Webster's 1913

1. adj. (Bot.) derived from or originating outside; pertaining to, or having the character of, an exogen; -- the opposite of endogenous.
2. adj. (Bot.) Growing by addition to the exterior; growing by addition of a new external layer of cells on the surface just beneath the bark; -- of plants.
3. adj. (Anat.) Growing from previously ossified parts; -- opposed to autogenous.
4. adj. (Med.) caused by factors from outside the body, rather than from an abnormality of internal functions; -- of illness.
5. adj. (Biol., Biochem.) not synthesized within the organism; absorbed or assimilated from outside the organism.

WordNet 3.0

1. adj. derived or originating externally