ˈasksəˌnīt noun
( -s )
Etymology: French, from Greek axinē axhead, ax + French -ite; from its ax-shaped crystals
: a mineral Ca 2 (MnFe)Al 2 BSi 4 O 15 OH, consisting of borosilicate of aluminum and calcium with varying amounts of iron and manganese commonly in brown glassy sharp-edged triclinic crystals (hardness 6.5-7, specific gravity 3.27-3.29)