nigrine

== English == === Etymology === Latin niger (“black”): compare French nigrine. === Noun === nigrine (mineralogy) A black ferruginous variety of rutile, or a compound of rutile and ilmenite. === References === “nigrine”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC. “nigrine”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026. === Anagrams === reining