adj.

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

[French exogène : Greek exō-, exo- + French -gène, -gen.]

exogenously ex·og'e·nous·ly adv.

The biology term "exogenous" — produced outside the body — was on the minds of biking fans today as Floyd Landis' slide from fame to infamy became more certain:

"Pierre Bordry, who heads the French anti-doping council, said the lab found that testosterone in Landis' urine samples came from an outside source. 'I have received a text message from Chatenay-Malabry lab that indicates the 'B' sample of Floyd Landis' urine confirms testosterone was taken in an exogenous way,' Bordry told The Associated Press."

Link: Times Argus: Vermont News & Information - Officials say synthetic testosterone found in Landis.

Posted August 6, 2006.

See our Word Overheard blog to see interesting uses of strange words.

(ek-soj′ə-nəs)
adj

Originating or caused by aspects external to a body.

In the World Anti-Doping Code, applied to a substance which is not capable of being produced by the body naturally. Compare endogenous.

Originating outside or caused by factors outside the organism.

• e. fecal contents — e.g. calcium taken in with the diet but not absorbed; is distinct from endogenous calcium which is contributed by the body.
• e. photodynamic agent — agent contributed by the environment; may be a primary agent or a hepatoxin.

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Dansk (Danish)
adj. - eksogen, udefra kommende

Nederlands (Dutch)
exogeen, geproduceerd door oppervlakteweefsel, van buitenaf komend

Français (French)
adj. - exogène

Deutsch (German)
adj. - exogen (abstammend von außerhalb)

Ελληνική (Greek)
adj. - εξωγενής

Italiano (Italian)
esogeno

Português (Portuguese)
adj. - exógeno

Русский (Russian)
имеющий внешнее происхождение

Español (Spanish)
adj. - exógeno

Svenska (Swedish)
adj. - exogen, bildat av det yttre, (ngt) som utökar sig utanför sig själv

中文（简体） (Chinese (Simplified))
外成的, 外因的, 外生的

中文（繁體） (Chinese (Traditional))
adj. - 外成的, 外因的, 外生的

한국어 (Korean)
adj. - 외생적인, 외인성인, 외래의, 외장경성 식물의

日本語 (Japanese)
adj. - 外因の, 外生の, 外因的な

العربيه (Arabic)
‏(صفه) خارجي المنشأ‏

עברית (Hebrew)
adj. - ‮צומח מבחוץ, שמקורו מבחוץ, חיצוני‬

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