(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.

(physics) A physical phenomenon in which a change in the magnetic moment of a free body causes the body to rotate, as a consequence of the conservation of angular momentum.

Alternative form of fraternal birth order effect

The scientific observation that a man's statistical probability of being homosexual increases with the number of older brothers he has.

Misspelling of effectively.