A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object).

Temperature measurement describes the process of measuring a current local temperature for immediate or later evaluation.

Thermonuclear fusion is the process of atoms combining or “fusing” together with huge amounts of heat.

Thermophotovoltaic (TPV) energy conversion is a direct conversion process from heat to electricity via photons.

A thermopile is an electronic device that converts thermal energy into electrical energy.

Any plastic material which can be softened under the application of heat or heat and pressure and then hardened by cooling, without any changes in its properties, e.g. polyvinyl chloride (PCV), nylon.

A thermoplastic-sheathed cable (TPS) consists of a toughened outer sheath of polyvinyl chloride (PVC) thermoplastic, covering one or more individual annealed copper conductors, themselves insulated with PVC.

A thermosetting polymer, often called a thermoset, is a polymer that is obtained from irreversibly hardening by curing from a soft solid or viscous liquid prepolymer (resin).

Thermosiphon is a method of passive heat exchange, based on natural convection, which circulates a fluid without the necessity of a mechanical pump.

A thermostat is a regulating device which senses the temperature of a physical system and performs actions so that the system's temperature is maintained near a desired setpoint.

A valve that is controlled automatically by the set temperature of the temperature sensor.

A thin film is a layer of material ranging from fractions of a nanometer (monolayer) to several micrometers in thickness.

A thin-film solar cell is a second generation solar cell that is made by depositing one or more thin layers, or thin film of photovoltaic material on a substrate, such as glass, plastic or metal.

Volatile liquids added to paints to speed up application and to support penetration by lowering the viscosity.

Thiols are used as odorants to assist in the detection of natural gas (which in pure form is odorless), and the "smell of natural gas" is due to the smell of the thiol used as the odorant.

Licensed member of the engine department, in charge of the eight to twelve watch. He maintains lighting fittings.

The licensed member of the deck department, in charge of the eight to twelve watch.

Algae can be produced in ponds or tanks on land, and out at sea.

Third-generation photovoltaic cells are solar cells that are potentially able to overcome the Shockley–Queisser limit of 31–41% power efficiency for single bandgap solar cells.

American inventor and businessman who established the first investor-owned electric utility in 1882, basing its infrastructure on DC power.