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otitis media inflammation of the middle ear.
oto- ear.
otolaryngology the branch of medicine dealing with the ears, nose, and throat, and with related structures of the head and neck.
otology the study of the form, function, and disorders of the ear.
otosclerosis a soft bonelike growth in the inner ear that can cause deafness.
ottava rima a poetic stanza of eight lines, the first six rhyming in alternation and the last two rhyming with each other.
Ottawa the capital of Canada. [3 definitions]
otter any of several sleek aquatic or semi-aquatic mammals that are related to the mink and weasel, and that have webbed feet, a long, somewhat flattened tail, and thick, dark brown fur.
ottoman a low, upholstered or cushioned stool; hassock. [2 definitions]
Ottoman Empire an empire of the Turks that existed from about 1300 to 1918 and that at times included much of the land bordering on the Mediterranean; Turkish Empire.
Ouagadougou the capital of Burkina Faso.
oubliette a hidden dungeon entered only through a trap door in the ceiling, as found in certain old castles.
ouch used to express sudden pain or annoyance.
oud a stringed musical instrument that resembles a lute, used esp. in Africa and Asia.
ought used to indicate what is considered to be morally correct or responsible behavior. [4 definitions]
oughtn't contracted form of "ought not".
ouguiya the chief monetary unit of Mauritania, equaling five khoums.
oui (French) yes.
Ouija trademark for a board having the alphabet and the numbers 1 through 10 printed on it, and a smaller board on casters which supposedly moves beneath one's fingers by power of spirits to spell out messages.
ounce1 a unit of weight equal to one sixteenth of a pound or 28.350 grams in the avoirdupois weight system, and equal to one twelfth of a pound or 31.1051 grams in the apothecaries' weight and the troy weight systems. (abbr.: oz.) [3 definitions]
ounce2 see snow leopard.