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barter to trade services or commodities without the use of money. [5 definitions]
bartizan a small extended turret atop a wall or tower, used as a vantage point for a watchman or defender.
Bartlett a large yellow juicy variety of pear.
Baruch Spinoza a Dutch philosopher (b.1632--d.1677).
baryon in physics, a heavy subatomic particle of half-integral spin, such as a proton, neutron, or hyperon.
barytes the principal ore of barium; barite.
basal at, pertaining to, or comprising the bottom part or support. [3 definitions]
basal metabolism the minimum expense of energy that is necessary for life in a resting organism.
basalt a dense, dark-colored igneous rock created by lava flow.
bascule a counterweighted balance, esp. that used in bridges that are raised and lowered.
bascule bridge a bridge that is counterweighted for ease of raising and lowering.
base1 that which underlies or supports; foundation. [7 definitions]
base2 of little value or quality; inferior. [2 definitions]
baseball a game played with a bat and ball by two teams of nine players each, the object being to score runs by advancing runners around four bases. [2 definitions]
baseboard a narrow board lining the lowermost edge of an interior wall. [2 definitions]
baseborn of humble parentage. [3 definitions]
baseburner a stove or furnace that feeds to the base of the unit additional fuel, such as coal, as needed.
base hit in baseball, a hit that allows the batter to get on base safely, without an error or force-out being made.
baseless without basis in fact or reason; unfounded.
base line in baseball, the area within which a runner must stay while running from base to base. [3 definitions]
baseman in baseball, a player covering first, second, or third base.