(physics) an early nuclear reactor fuelled by uranium and moderated with graphite

The era, starting in the mid-1940s, during which nuclear energy was developed, and in which it was thought that all energy would be provided by such sources.

Used other than figuratively or idiomatically: see at, home. In one's place of residence. / (idiomatic) At ease; comfortable. / In the home of one's parents.

(historical) A type of reception or party whereby the host says they will be ‘at home’ during specific hours, when guests can come and go as they like.

(physics, chemistry) the equivalent of an atom in which either the nucleus, or an electron, is replaced by some other subatomic particle

(idiomatic) After a long time; eventually. / (idiomatic) In the end; finally; ultimately.

To evoke or cause someone to be relaxed or calm.

(military) In double time. / (soccer) scoring a brace

(idiomatic) To immediately accept an offer; to seize an opportunity.

(physics) any device that converts the energy of particles emitted from atomic nuclei into electrical energy