ˈd(y)üˌmänt.ˌīt, ̷ ̷ˈ ̷ ̷ˌ ̷ ̷ noun
( -s )
Etymology: French dumontite, from André Dumont died 1857 Belgian geologist + French -ite
: a hydrated phosphate Pb 2 (UO 2 ) 3 (PO 4 ) 2 (OH) 4 .3H 2 O of uranium and lead occurring in yellow orthorhombic crystals