An automatic safety feature of nuclear reactors where the control rods are automatically dropped into the reactor core when any of several emergency conditions are reached.

(often derogatory) An in-depth article that discusses a topic thoroughly and elaborates the writer's point of view, to inspire deep thought related to the article's subject.

A female given name from English from the plant or colour hazel. Popular in the U.S. at the turn of the 20th century. / A topographic surname from Middle English for someone who lived near a hazel ...

A surname.