‖ flos-ferriMin.|ˈflɒsˈfɛraɪ| [L.; = ‘flower of iron’.] A coralloid variety of aragonite, often found with iron ore. 1748Sir J. Hill Hist. Fossils 344 This species is..called..Flos Ferri.1878Lawrence tr.Cotta's Rocks Class. 51 Flos-ferri is formed in great perfection in the Styrian iron-mines.