A surname. / Ellipsis of McCool.; A surname from Irish, anglicized form of McCool.

(video games) A combat or video game in the genre characterized by a three-dimensional view from the player's perspective and the ability to fire a weapon.

A peptidic molecule consisting of 19 amino acids, obtained from Streptomyces and having antimicrobial activity.

(physics) a simple device that detects the presence of an electric charge by the mutual repulsion of metal foils or pith balls