(physics) An artificial helium-like atom where the Coulombic electron-nucleus interaction potential is replaced by a harmonic potential.

(narratology, informal) A plot device where information or characters are placed into a plot that can provide the basis for subsequent sequel stories.

(music) Before the hook (normally a chorus) of a popular song.

(computing, programming) A section of code that runs immediately before a hook call.

present participle of hook up

Alternative form of billhook

Alternative form of billhook

A thunderbolt drawn as a straight-edged runic s with a horizontal bar in the middle and the ends angled at 90 degrees centerwise, especially a Nazi one.

(typography) A tone mark ( ̉) that indicates falling then rising tone in Vietnamese.

An ogonek (˛). / A retroflex hook (̢). / A cedilla (¸). / other similar diacritics