limonin

[Mod. Lat. limon(ia); suff. -in ( Chem.).] Chem. The bitter principle contained in the pips of the orange and lemon. It forms small crystals, easily soluble in alcohol and acetic acid, and melts at 124°. 11-mon-ite, s. [Gr. leimoōn=meadow: suff. -ite. ( Min .).] Min .: A hydrated sesquioxide of iron occurring in stalactitic, botryoidal, or mammillary forms, having a more or le fibrous structure; more frequently earthy. Hardne , 5 to 5.5; specific gravity, 36 to 4. Luster, silky, sometimes sub metallic, dull, or earthy. Color of fractured surfaces, various shades of dark brown; exterior sometimes black, and shining like varnish. Earthy varieties, brownish to ocher-yellow. Streak, yellowish-brown. Dana divides it thus: Var. 1. Compact; luster, sub metallic to silky, often stalactitic, botryoidal, . Var. 2. Ocherous or earthy; color, brownish to ocher-yellow. Var. 3. Bog ore; found in marshy places, often replacing the substance of wood, leaves, nuts, . Var. 4. Brown clay-ironstone, the brownish-yellow streak of which distinguishes it from the clay-ironstone of hæmatite and siderite (q. v.). This variety is sometimes (a) pisolitic, being an aggregation of small pea-like concretions or larger ellipsoidal forms (Ger. Bohnerz =bean ore) or (b) oõlitic. Composition: Sesquioxide of iron, 85.6; water, 14.4; corresponding to the formula 2Fe2O33HO. Found in the secondary or later deposits, in beds a ociated with various other minerals, and often with manganese ores; also as a recent marsh deposit. Derived from the alteration of other iron ores or of minerals containing protoxide of iron. One of the most important ores of iron. Found frequently as pseudomorphs of many other mineral species. 11-mop-sis, s . [Gr. limos hunger, and ops is = appearance.] Zool. & Palæont .: A genus of Arcade. The shell is orbicular, convex, slightly oblique, ligamental area with a cartilage-pit in the center; hinge with two equal series of transverse teeth. Recent species, four, from Britain, Japan, and the Red Sea; fo il, thirty-six, from the Bath Oõlite onward.