(chemistry, physics) A distortion of any symmetric non-linear molecule which reduces its symmetry and lowers its energy.

The ability (or the difficulty) of focusing one's attention on a single auditory source in a jumble of noises.

(physics) A form of the Zeeman effect that affects the spectral lines obtained when a light source is placed in a very strong magnetic field.

(chemistry, physics) a technique of extractive distillation in which a salt or a non-volatile liquid is added to the mixture being distilled in order to remove azeotropes and aid separation

(quantum mechanics) An effect marked by the quantization of the Hall resistance, observed in two-dimensional electron systems subjected to low temperatures and strong magnetic field.

(medicine, statistics) A skewing of data in randomized medical studies that occurs when healthy participants are less likely to drop out of the study than sicker patients.

(astronomy) An optical effect, occurring during the transit of an object in front of the Sun, by which light is bent around the object, causing it to look stretched out.

Synonym of white coat hypertension

plural of quantum Hall effect

(physics) An anomalous threshold voltage behavior of certain sub-halfmicron semiconductors due to migration of specific elements and local oxidation