Ethylene glycol
A form of alcohol used as a coolant for liquid-cooled engines and as an anti-icing agent.
Aviation Maintenance Technician Handbook — Airframe, p. G-14
Also defined in 1 more source
A form of alcohol used as a coolant for liquid-cooled aircraft engines. It is also used in automobile engines as a permanent antifreeze.
Aviation Maintenance Technician Handbook — Powerplant, p. G-11