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Definition of Teleological

Teleological: Serving an ultimate purpose in its design.

For example, "What is the true purpose of the nose?" That is a teleological question. For another example, to say that all evolutionary changes occur for a definite purpose is a teleological explanation of evolution.

"Teleological" comes from ancient Greek roots but did not enter English until the 18th century. It is a compound of the Greek "tele-, telos," meaning "end or purpose" + the ending "logos" meaning "the science or study of" = the study of the ends or purposes.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=14123
Last Editorial Review: 6/14/2012

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