Smear

Smear may refer to:


 * A smear test, wherein a sample is smeared over a microscope slide to be studied for any pathology
 * A smear test usually refers to a pap test, that is, a cervical smear
 * Smear (card game)
 * Smear Lake, a lake in Wisconsin
 * Smear campaign, or smear job, an attack on the reputation of an individual or group making use of disinformation tactics
 * Smear Campaign (album), an album by Napalm Death
 * Pat Smear, the guitarist and actor
 * Smear (optics), motion that degrades sharpness, which is generally linear over the integration time
 * Colloquial name for a glissando, a glide from one musical pitch to another

Smearing may refer to:
 * Smearing of an image taken by an astronomical interferometer:
 * Bandwidth smearing, a chromatic aberration;
 * Time smearing, a consequence of Earth rotation during the observation;
 * Smearing (climbing), a technique of rock climbing
 * Electron smearing, a tool for improving convergence in DFT calculations