Definition of quadrihydrate in US English:

quadrihydrate

noun

Chemistry
rare
  • A compound containing four water molecules (or, formerly, hydroxide groups) in its empirical formula.

Origin

Early 19th century; earliest use found in Thomas Thomson (1773–1852), chemist. From quadri- + hydrate.

Pronunciation

quadrihydrate

/ˌkwɒdrɪˈhʌɪdreɪt/