Callitris, of Australia / Actinostrobus, of Australia / Widdringtonia, of Southern Africa

A laboratory tube used in colorimetric analysis.

Taxodium distichum, deciduous conifer trees native to often-flooded areas of the southeastern and south central parts of the United States.

Cupressus macnabiana, a cypress found only in California.

A benign swelling of the semimembranosus or more rarely some other synovial bursa found behind the knee joint.

(idiomatic) To act so as to end a repeating pattern of harmful or otherwise negative behavior.

(medicine) A urinary tract infection.

In a variable-expansion central-valve steam engine, a small auxiliary engine for automatically adjusting the steam distribution to the load on the main engine.

(thermodynamics) The cycle for the air engine proposed by Joule. In it air is taken by a pump from a cold chamber and compressed adiabatically until its pressure is equal to that of the air in a hot chamber, into which it is then delivered, thereby displacing an equal amount of hot air into the engine cylinder. Here it expands adiabatically to the temperature of the cold chamber into which it is finally exhausted. This cycle, reversed, is used in refrigeration.

(thermodynamics) An ideal heat-engine cycle in which the working fluid goes through four successive operations: (1) isothermal expansion to a desired point; (2) adiabatic expansion to a desired point; (3) isothermal compression to such a point that (4) adiabatic compression brings it back to its initial state.