- Occurring naturally and normally in a certain type of tissue or in a specific structure of the body.
- In transplantation, referring to transfer of an organ or other tissue from one location to another in the same person; or to blood or blood components that the donor has previously donated and receives at a later time, usually perioperatively.
- Rarely used to denote a neoplasm derived from cells that occur normally at that sight, a squamous cell carcinoma in the upper esophagus.
[auto- + G. logos, relation]
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Examples: glitazone, GI cocktail, etc.