from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Originating internally.
  • adjective Originating or produced within an organism, tissue, or cell.

from The Century Dictionary.

  • In bot.: Of or pertaining to the class of endogens; growing or proceeding from within: as, endogenous trees or plants; endogenous growth.
  • Originating within; internal; specifically, formed within another body, as spores within a sporangium.
  • In anat.: Same as autogenous.
  • Inclosed in a common cavity of the matrix, as cartilage-cells.
  • In geology, formed within a mass of rock or even within the earth itself: especially employed to describe the effects, in contact-metamorphism, produced in the intrusive rock itself, as distinguished from those in the walls.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective (Bot.) Increasing by internal growth and elongation at the summit, instead of externally, and having no distinction of pith, wood, and bark, as the rattan, the palm, the cornstalk.
  • adjective (Biol.) Originating from within; increasing by internal growth.
  • adjective (Biol.) a method of cell formation, seen in cells having a cell wall. The nucleus and protoplasm divide into two distinct masses; these in turn become divided and subdivided, each division becoming a new cell, until finally the original cell wall is ruptured and the new cells are liberated (see Segmentation, and Illust. of Cell Division, under Division). This mode of growth is characteristic of many forms of cells, both animal and vegetable.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective produced, originating or growing from within
  • adjective of a disease, caused by factors within the body

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective of or resembling an endogen
  • adjective derived or originating internally


from Wiktionary, Creative Commons Attribution/Share-Alike License

endo- + -genous


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  • ....and it's more extrovert twin "exogenous".

    January 7, 2007

  • WeirdNET has mastered adjectival derivation.

    June 2, 2008