Acronym of primary account number. / Acronym of personal area network. / (organic chemistry) Initialism of polyacrylonitrile. / (organic chemistry) Initialism of peroxyacetyl nitrate.

(physics) A subatomic particle with an unusually long lifetime and a large mass; a bound state of a charm quark and an anti-charm quark.

(physics) A pair of electrons (or other fermions), of opposite spin, whose theorised behaviour is the basis of the BCS theory of superconductivity.

An amusement park that has one or more specific central themes, often as part of its name

The delivery of newspapers to individual subscribers' houses.

The particular green party of a country or region.

The surface or structure from which a launch is made. / (figuratively) A starting point.

(law) The party in a civil lawsuit whom the factfinder determines to be right, and who, in some jurisdictions, may recover attorney's fees and other expenses associated with the prosecution or defense of the lawsuit.

(physics) Any particle, especially a subatomic particle, that carries an electric charge. / (chemistry) An ion.

(law, archaic) The party to a legal dispute against whom a complaint was initially raised in a court.