fillowiteMin.|ˈfɪləʊaɪt| [Named by Brush and Dana 1879 after A.N. Fillow: see -ite.] A phosphate of manganese, iron, calcium and sodium, found in transparent yellow or brown crystals. 1879Amer.Jrnl.Sc.Ser. iii. XVII. 363 Fillowite occurs in granular crystalline masses.