caliper rule |
a graduated rule with one jaw that slides and one that is fixed. |

gag rule |
a rule or law that restricts discussion of a particular topic, as in a legislative body. |

golden rule |
a rule of conduct that is usu. phrased "Do unto others as you would have them do unto you". |

ground rule |
(usu. pl.) basic rules governing the behavior in a given situation, esp. as concerns the playing of a game on a particular field, course, or court. |

home rule |
the principle or practice of self-government by the citizens of a country, state, or city, esp. as granted by a controlling authority. |

Rule 22 |
the rule of the U.S. Senate that lists the precedence of U.S. Senate motions and describes the procedure for ending a filibuster. [2 definitions] |

rule of three |
the method of finding the fourth term of a mathematical proportion when three terms are given, the product of the first and fourth terms being equal to the product of the second and third. |

rule of thumb |
a general rule or method based on practical experience rather than scientific proof. [2 definitions] |

rule out |
to remove from consideration. |

rule the roost |
to dominate or control one's family or associates. |

self-rule |
self-government. |

slide rule |
a calculation device, consisting of a ruler with a sliding middle piece, both sides and the middle piece being marked with different number scales. |