(psychology) A strong opposing response caused by attempts to restrict a person's freedom or change their attitudes.

The quality or state of being effable.

The tendency of individuals to give high accuracy ratings to descriptions of their personality that are in fact vague and general enough to apply to a wide range of people.

(aeronautics) ground effect on a wing of an aircraft flying close to the ground

(archaic) second-person singular simple present form of efface

A gradual decrease in effectiveness.

The supposed tendency of warmer water to freeze more quickly than colder water.

An electronic device that alters how a musical instrument or other audio source sounds.

The phenomenon whereby the greater the expectation placed upon people is, the better they perform.

A phenomenon encountered in interferometry that is elicited by rotation. The Sagnac effect manifests itself in a setup called a ring interferometer. A beam of light is split and the two beams are made to follow the same path but in opposite directions. To act as a ring the trajectory must enclose an area. On return to the point of entry the two light beams are allowed to exit the ring and undergo interference. The relative phases of the two exiting beams, and thus the position of the interference fringes, are shifted according to the angular velocity of the apparatus.