plural of hyena dog

Synonym of African wild dog

(chemistry) triangulene

an atomic clock which uses the 1.4 GHz transition in a hydrogen atom to measure time to within 0.45 nanoseconds over a span of 12 hours

plural of hydrogen maser atomic clock

Hydrogen that is generated entirely with power from renewable energy and the electrolysis of water; which generates no carbon pollution.

hydrogen generated from methane feedstock, typically from natural gas/petroleum gas, whose carbon residue, typically carbon dioxide, is captured, resulting in a low-carbon process.

(historical) The prevention and control of venereal disease, prostitution, drug abuse, and vice, employing scientific research and advertising techniques.

Synonym of hybrid learning

An extinct subspecies of spotted hyena, Crocuta crocuta spelaea, which lived in Eurasia during the Pleistocene.