tinˈkalkəˌnīt, tiŋˈk- noun
( -s )
Etymology: tincal + Greek konia ashes, dust + English -ite — more at incinerate
: a mineral Na 2 B 4 O 7 .5H 2 O consisting of sodium borate pentahydrate that is one of the principal ore minerals of borax and boron compounds — compare kernite