Definition of centrallasite in US English:

centrallasite

(also centrallassite)

noun

Mineralogy
disused
  • A hydrous silicate of lime, subsequently identified with gyrolite.

Origin

Mid 19th century. From ancient Greek κέντρον + ἀλλάσσειν to change + -ite. The mineral is so called because its change of colour to white begins at the centre.

Pronunciation

centrallasite

/sɛnˈtraləsʌɪt/