(psychology) A cognitive bias in which judgment of somebody's character is influenced by an overall impression of him or her.

plural of Streisand effect

A deleterious placebo effect.

(chemistry, physics) The effect that differing masses of different isotopes of the same element have on the physical and chemical properties of that element

The tendency for the peak luminance sensitivity of the human eye to shift toward the blue end of the spectrum at low illumination levels.

(philosophy, natural science) The being or event which physically brings about the change or motion that produces another occurrence or thing.

plural of greenhouse effect

(archaic) Third-person singular simple present indicative form of efface

US standard spelling of centre of effort.

A hypothetical psychological effect through which people who live in close domestic proximity during the first few years of their lives become desensitized to later sexual attraction. It is one explanation for the incest taboo.