(countable) A British surname transferred from the given name. / A Scottish surname from Scottish Gaelic. / A city, the county seat of McDuffie County, Georgia, United States.

(philosophy) A hypothetical lamp in a philosophical paradox. The lamp is repeatedly turned on and off by means of a switch; at the end of this time period, regarded as the sum of an infinite series of intervals, it seems paradoxically that the lamp cannot be either on or off.

A species of gazelle, Eudorcas thomsonii

A process of electric welding in which heat is developed by a large current passing through the metal.

plural of Thomson's gazelle

The problem of determining the minimum electrostatic potential energy configuration of a given number of electrons constrained to the surface of a unit sphere that repel each other with a force given by Coulomb's law.

plural of Joule-Thomson effect

(thermodynamics) The temperature change of a real gas or liquid (as differentiated from an ideal gas) when it is forced through a valve or porous plug while kept insulated so that no heat is exchanged with the environment.

A form of poikiloderma sometimes associated with osteosarcoma.

plural of Joule-Thomson expansion