Definition of "exogenous" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "PERPER: Well, definitely, she had a good what we call exogenous, outside reason for depression."
• "If the marketplace has withdrawn buyers, this is called exogenous liquidity risk a characteristic of the market which is a collection of buyers; a typical indicator here is an abnormally wide bid-ask spread."
• "For the record, my greatest concern with desiccated thyroid (or levothyroxine or T3) is when they prescribed in a manner that results in long-term exogenous hyperthyroidism."