| bachelor |
an unwed man, esp. one who has never married. [2 definitions] |
| back |
the part of a human or other vertebrate that is on the opposite side from the chest and abdomen and between the neck and the tailbone. [15 definitions] |
| back and forth |
moving backward then forward, or forward then backward, often repeatedly. [2 definitions] |
| backboard |
a board at the rear of something, serving as a support. [2 definitions] |
| backbone |
the series of bones that run along the center of the back; spinal column; vertebrae. [3 definitions] |
| backfire |
to emit a loud noise as the result of inefficient functioning of the engine of a car or other internal-combustion vehicle. [4 definitions] |
| backgammon |
a board game in which each of two opponents throws dice and tries to move several pieces clockwise around and eventually off the board. |
| background |
a part located in the rear, esp. as depicted in a painting, photograph, or scene. (Cf. foreground.) [5 definitions] |
| backhand |
a forward movement made with the back of the hand outward, as in a slap or a stroke with a tennis racket. [5 definitions] |
| backhoe |
an excavating vehicle with a large metal bucket that is drawn toward the vehicle in a digging motion. |
| back out of |
to withdraw from prematurely. [2 definitions] |
| backpack |
a pack used to carry objects, esp. camping gear, on one's back; knapsack. [3 definitions] |
| back road |
(often pl.) a country road or local road that avoids traffic as well as high speed travel. |
| back seat |
a seat or seating area behind other seats, esp. of a vehicle. |
| backstroke |
a stroke made with the back of the hand outward, as in tennis. [3 definitions] |
| backward |
in the direction of or to the rear or back. [8 definitions] |
| backward and forward |
in depth; completely; thoroughly. |
| backyard |
an open area behind a house that is part of the homeowner's property. |
| bacon |
a fatty, smoked, and salted form of pork, taken from the back and side of the pig. |
| bacteria |
pl. of bacterium. Bacteria are one-celled microscopic organisms of various shapes that are often agents of fermentation and putrefaction and that, in some cases, cause disease. |
| bacterium |
any of a large group of one-celled microscopic organisms of various shapes that are often agents of fermentation and putrefaction and that may cause disease. |