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endogenous

[en-doj-uh-nuhs]

Origin

adjective

proceeding from within; derived internally.

Biology. growing or developing from within; originating within.

Pathology. (of a disease) resulting from conditions within the organism rather than externally caused.

Biochemistry. pertaining to the metabolism of nitrogenous elements of cells and tissues.

Geology. endogenetic.

Origin:
1825–35; endo- + -genous

Related forms

en·do·ge·nic·i·ty

[en-doh-juh-nis-i-tee] , noun

en·dog·e·nous·ly, adverb

Can be confused: endogenous, indigenous.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Endogenous is always a great word to know.

So is analogous. Does it mean:

corresponding in function, but not evolved from corresponding organs, as the wings of a bee and those of a hummingbird

any organism that derives its energy for food synthesis from light and is capable of using carbon dioxide as its principal source of carbon

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Collins

World English Dictionary

endogenous (ɛnˈdɒdʒɪnəs)

—*adj*
1.	biology developing or originating within an organism or part of an organism: endogenous rhythms
2.	having no apparent external cause: endogenous depression

en'dogenously

—*adv*

en'dogeny

—n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

endogenous

1830, from endo- + -genous "producing."

Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage

Medical Dictionary

endogenous en·dog·e·nous (ěn-dŏj'ə-nəs)
adj.