Any of several species of coral with the appearance of a brain, in the families Mussidae and Merulinidae.

A condition to which male high school and college students are prone consisting of difficulty in concentrating, mild forgetfulness, and difficulty in maintaining a train of thought, arising from "too much thinking". Physical symptoms can manifest as well.

A form of indoctrination that forces people to abandon their beliefs in favour of another set of beliefs by conditioning through various forms of pressure or torture

(figuratively, slang, mildly vulgar) Something ill-considered and said or done impulsively. / (figuratively, slang, mildly vulgar) An instance of absent-mindedness or forgetfulness.

(derogatory) A foolish or dull-witted person.

The migration of educated or talented people from less economically advanced areas to more economically advanced areas, especially to large cities or richer countries.

Synonym of knowledge worker

(chiefly US) Originally, a group of experts who advise a government, often informally. / More recently, any group of experts assembled to give advice.

Alternative form of harebrained

Alternative form of brainwave