ˌ ̷ ̷ ̷ ̷ˈsfēˌnīt noun
( -s )
Etymology: International Scientific Vocabulary leuc- + sphen- + -ite; probably originally formed as German leukosphenit
: a mineral Na 4 BaTi 2 Si 10 O 27 consisting of a sodium barium silicotitanate occurring in white wedge-shaped crystals