(regional, now rare) One of several species of sea birds of the genus Puffinus, especially, Ardenna gravis (syn. Puffinus gravis, Puffinus major), the great shearwater, and Puffinus stricklandi, the black hagdon or sooty shearwater.

plural of Hagar

(humorous) A fictional creature supposed to live in Scotland and to be the source of the meat dish called haggis (which is actually made from sheep innards).

(physics) The temperature at which hadronic matter (i.e. ordinary matter) is no longer stable, and must either "evaporate" or convert into quark matter.

Alternative form of hagdon

Obsolete form of arquebus.

plural of hagbush

plural of hagdown

(historical) A Jewish paramilitary organization in the British Mandate of Palestine (1921–48), which became the core of the Israel Defense Forces (IDF).

plural of Hagan