MARBLE n.
A massive, compact limestone; a variety of calcite, capable of being polished and used for architectural and ornamental purposes. The color varies from white to black, being sometimes yellow, red, and green, and frequently beautifully veined or clouded. The name is also given to other rocks of like use and appearance,…
MARL n.
A mixed earthy substance, consisting of carbonate of lime, clay, and sand, in very varivble proportions, and accordingly designated as calcareous, clayey, or sandy. See Greensand.
MATCH n.
ars, fireworks, etc. -- Slow match, slightly twisted hempen rope soaked in a solution of limewater and saltpeter or washed in a lye of water and wood ashes. It burns at the rate of four or five inches an hour, and is used for firing cannon, fireworks, etc.
MENSURATION n.
oes a thing; an act or process; the result of an act or process; state or condition; as, aliment, that which nourishes, ornament, increment; fragment, piece broken, segment; abridgment, act of abridging, imprisonment, movement, adjournment; amazement, state of being amazed, astonishment.
MESENTERON n.
All that part of the alimentary canal which is developed from the primitive enteron and is lined with hypoblast. It is distinguished from the stomod, a part at the anterior end of the canal, including the cavity of the mouth, and the proctod, a part at the posterior end, which are formed by invagination and are lined w…
METALLIC a.
rom its ores, as magnetic iron. -- Metallic paper, paper covered with a thin solution of lime, whiting, and size. When written upon with a pewter or brass pencil, the lines can hardly be effaced. -- Metallic tinking (Med.), a sound heard in the chest, when a cavity communicating with the air passages contains both ai…