Oino-mania: A disease of the brain produced by excessive use of alcoholic stimulants; derived from two Greek words, oinos, wine, and mania, madness. The same disease sometimes arises from overuse of tobacco and other stimulants of the nerves.

Orleans, (Elizabeth Charlotte de Baviere) Duchess of: Second wife of Philippe, the brother of Louis XIV., was born at Heidelberg, May 26th, 1652, and died at the palace of St. Cloud, in Paris, December 8th, 1722. She was author of several works; among which were Memoirs and Anecdotes of the Court of Louis XIV.

Ottoman: A kind of hassock or thick mat for kneeling upon; so-called from being used by the Ottomans or Turks.

Oxalic acid: a vegetable acid, which exists in sorrel.

Oxide: A compound of a substance with oxygen, though not enough oxygen to produce an acid; for example, oxide of iron, or rust of metals.

Oxidize: To combine oxygen with a body without producing acidity.

Oxygen: The vital element of air, a simple and very important substance which exists in the atmosphere and supports the breathing of animals and the burning of combustibles. It was called oxygen from two Greek words, signifying to produce acid, from its power of giving acidity to many compounds in which it predominates.

Oxygenized: Combined with oxygen.

Pancreas: A gland within the abdomen just below and behind the stomach, and providing a fluid to assist digestion. In animals, it is called the sweet-bread.

Pancreatic: Belonging to the pancreas.