Any time-dependent strain developing in a material or an object in response to the application of a force or stress.
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(krēp) 1. a slow flow over time that occurs with materials under stress below their elastic limits, often due to warm temperature; it may occur with dental materials in the mouth. 2. the time-dependent strain in a tissue or body as a result of application and maintenance of a stress at a set level.Medical dictionary. 2011.