axinite

noun

ax·​i·​nite

ˈaksəˌnīt

plural -s

: a mineral Ca₂(MnFe)Al₂BSi₄O₁₅OH, 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)

Word History

Etymology

French, from Greek axinē axhead, ax + French -ite; from its ax-shaped crystals

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!