ˈwithəˌrīt noun
( -s )
Etymology: German witherit, irregular from William Withering died 1799 English physician + German -it -ite
: a mineral BaCO 3 consisting of a native barium carbonate isostructural with aragonite and occurring as orthorhombic white or gray six-sided twin crystals and also in columnar or granular masses (hardness 3-3.75, specific gravity 4.27-4.35)