Moya. A term applied in South America to mud poured out from volcanoes during eruptions.
Multilocular. Many-chambered; a term applied to those shells which, like the nautilus, ammonite, and others, are divided into many compartments. Etym., multus, many, and loculus, a partition.
Muriate of Soda. The scientific name for common culinary salt, because it is composed of muriatic acid and the alkali soda.
Musaceæ. A family of tropical monocotyledonous plants, including the banana and plantains.
Muschelkalk. A limestone, belonging to the Upper New Red Sandstone group. Its position is between the Magnesian Limestone and the Lias. This formation has not yet been found in England, and the German name is adopted by English geologists. The word means shell limestone. Etym., muschel, shell, and kalkstein, limestone.
Naphtha. A very thin, volatile, inflammable, and fluid mineral substance, of which there are springs in many countries, particularly in volcanic districts.
Nenuphar. A yellow water-lily. P. 618.
New Red Sandstone. A formation so named, because it consists chiefly of sandy and argillaceous strata, the predominant color of which is brick-red, but containing portions which are of a greenish-gray. These occur often in spots and stripes, so that the series has sometimes been called the variegated sandstone. This formation is divided into the Upper New Red in which the Muschelkalk is included, and the Lower New Red, of which the Magnesian Limestone is a member.
Nodule. A rounded irregular-shaped lump or mass. Etym., diminutive of nodus, knot.