A solid mass formed in the gallbladder composed of cholesterol and bile salts.
An instrument for emitting high-pitched tones and ultrasound for determining the upper limits of the hearing range in humans and other animals
Any form of medical treatment that uses electricity.
An instrument for detecting and measuring small electric currents.
Burners for the combustion of gas, usually with various arrangements of holes through which gas issues.
A cylinder in which pressurized gas is stored
Death and decay of wound tissue infected by a soil-based bacteria. Toxins produced by the bacterium cause decay of connective tissue and the generation of gas.
A standard key used for unlocking the gas lamps in railway carriages in order to service and maintain them.
A respirator that contains a chemical air filter and is worn over the face as protection against toxic gases and aerosols
gas turbine train
A train powered by gas turbine propelled motive power.
A bacterial or viral infection caused by the inflammation of both the stomach and the small intestine.
Any type of surgery that addresses problems with the stomach or small intestine.
Swinging or sliding barriers used to fill or close a gateway between two exterior spaces, often made of a grating or open framework or forming a heavy or rough structure.(W) Also, interior barriers resembling these. For barriers of more solid and finished construction and usually leading to interior spaces, use "doors."
Use generally for devices designed to measure or otherwise determine the size, state, or mechanical accuracy of something.
Hardened steel block having two flat, parallel surfaces with the parallel distance between the surfaces marked to a guaranteed accuracy of a few millionths of an inch; used in manufacturing processes as a precise measuring standard.
gauge glass fitting
The brass fitting holding the glass column indicating the level of the water in the boiler.
Has come to refer to the socially constructed roles and differences between men and women; as opposed to 'sex' which refers to the biological distinctions between male and female.
Part of the nucleus of a cell that determines how our bodies function. Genes are passed from parents to children.
Diseases, such as cystic fibrosis, that are passed from parents to child and which have their origins in changes to DNA.
The techniques involved in altering the characteristics of one organism by inserting genes from another organism into its DNA.