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oleoresin a naturally occurring mixture of resin and an essential oil such as turpentine.
olfaction the faculty of perceiving odors; sense of smell. [2 definitions]
olfactory of, concerning, or stimulating the perception of smells. [3 definitions]
olfactory nerve either of the first pair of cranial nerves that transmit nerve impulses from the mucous membrane in the nose to the forebrain.
oligarch one of the rulers in an oligarchy.
oligarchy a government or state in which a few people or a family rule. [2 definitions]
oligo- little; few.
Oligocene of, relating to, or designating the geological epoch between the Eocene and Miocene of the Tertiary Period, from approximately 38 million to 26 million years ago, when mastodons and apes appeared. [2 definitions]
oligopoly the control of supply of a good or service in a given market by a limited number of sellers.
oligopsony the market condition that exists when the number of buyers is so small that the actions of just one of them can affect price. (Cf. duopsony, monopsony.)
olio any miscellaneous collection of elements, esp. of music, stage entertainment, writing, or food; potpourri.
olive a small green or black fruit with a pit, eaten raw or used as a source of oil. [5 definitions]
olive branch the branch of an olive tree as a token of peace, or any peace offering.
olive drab a dull olive or greenish brown color. [3 definitions]
olive green a yellowish green color; color of an unripe olive.
olive oil oil pressed from ripe olives, used esp. in cooking.
Oliver Cromwell an English revolutionary general and the Lord Protector of England in 1653-58 (b.1599--d.1658).
Oliver Wendell Holmes, Jr. an influential U.S. Supreme Court justice (1902-1932), known for exercising judicial restraint and cited frequently for the opinion he wrote for Schenck v. United States, in which he argued that freedom of speech could be limited only in cases when particular acts of expression presented a "clear and present danger" to the country or its people (b.1841--d.1935).
olivine a common mineral silicate of magnesium and iron, found in gray-green crystalline masses in igneous and metamorphic rock, and used esp. as a structural material in bricks for lining furnaces.
olla (Spanish) a wide-mouthed earthenware pot or jar, used for water, cooking, or the like. [2 definitions]
ollie a skateboarding move in which one tips the board up by putting weight on the rear foot and thrusts forward with the front foot, simultaneously jumping into the air, with the feet appearing to stay on the skateboard.