binary star |
two stars orbiting around a common center of gravity and often appearing as one to the unaided sight or through a telescope; double star. |

binary system |
a numbering system with a base of two. In binary numbers, any number can be expressed by 1, 0, or a combination of these. The number five is written as "101" in the binary system. |

binate |
produced in two parts or pairs, as certain leaves. |

binational |
of, pertaining to, composed of, or involving two nations. |

binaural |
having two ears. [3 definitions] |

bind |
to make secure by fastening, as with cord or the like. [13 definitions] |

binder |
a large, sturdy notebook cover that contains a device for holding loose papers. [4 definitions] |

bindery |
a place where books are bound. |

binding |
the act of fastening, securing, and holding together. [6 definitions] |

bindle |
(slang, old-fashioned) a bundle of possessions carried by a hobo, usually including bedding. Traditionally, a bindle might be tied to a stick and carried over the shoulder. |

bindweed |
any of several related twining or vinelike plants that bear pink or white trumpet-shaped flowers. [2 definitions] |

bine |
the stem of any of various twining or vinelike plants. [2 definitions] |

Binet-Simon scale |
a series of tests graded according to the mental abilities at different ages of the average population, esp. children, with which the abilities of the individual test-taker can be compared. |

Bing cherry |
a variety of sweet, dark red cherry. |

binge |
(informal) a period of overindulgence, esp. in drinking alcoholic beverages or eating. [2 definitions] |

bingo |
a game of chance in which markers are placed on numbered squares on a card, in accordance with numbers chosen randomly and announced by a caller, and which is won by placing five such markers in a row. |

binnacle |
the nonmagnetic stand or case that supports or encloses a ship's compass. |

binocular |
pertaining to or involving the use of two eyes. [2 definitions] |

binomial |
in algebra, an expression made up of two terms with either a plus or a minus sign between them. [2 definitions] |

binomial theorem |
a general formula for expressing any power of a binomial expression without multiplying. |

bio |
(informal) a biography, usu. very brief. |