Definition of websterite in English:

websterite

noun

Mineralogy
rare, historical
  • A whitish mineral consisting of a hydrated basic sulphate of aluminium, typically occurring in opaque, clay-like masses.

noun

Geology
  • An ultramafic, ultrabasic rock formed in the cavities and fissures of other rocks and composed of approximately equal amounts of orthopyroxene and clinopyroxene, typically having a greyish, banded appearance.

Origin

Early 19th century; earliest use found in Henry James Brooke (1771–1857), crystallographer. From French websterite from the name of Thomas Webster, Scottish geologist + French -ite<br>late 19th century. From Webster, the name of a village in N. Carolina, where the mineral was originally discovered + -ite.

Pronunciation

websterite

/ˈwɛbstərʌɪt/