angular |
measured by the degrees of an arc. [1/3 definitions] |

arc furnace |
an electric furnace in which heat is produced by an arc formed between the material being heated and an electrode, or between two electrodes. |

arc lamp |
a lamp, such as a searchlight, in which light is produced by an electric arc passing through a gas between two hot electrodes; arc light. |

arc welding |
a method of welding in which the extreme heat of an electric arc is used. |

azimuth |
an arc measured horizontally and clockwise from a point north, in navigation, or a point south, in astronomy, to another point where a vertical circle intersects the horizon. [1/2 definitions] |

bloop |
(informal) in baseball, to hit (the ball) in a low arc that carries just beyond the infield, usu. for a hit. [1/2 definitions] |

blooper |
(informal) in baseball, a hit ball that flies in a low arc just beyond the infield, usu. for a hit. [1/2 definitions] |

carbon |
in carbon arc lighting or welding, either of two graphite rods into which electrical current is conducted to form the arc. [1/7 definitions] |

cosecant |
in trigonometry, the secant of the complement or the reciprocal of the sine of a given angle or arc. |

crescent |
the shape of the moon as it appears in its first or last quarter, an arc tapering to a point at either end. [1/5 definitions] |

curve |
an arc of a circle or any line resembling such a segment. [1/7 definitions] |

klieg light |
a powerful, bright arc light used esp. to light the sets for motion pictures. |

lob |
to hit or throw (a ball or the like) in a high, often slow arc. [2 definitions] |

midpoint |
in geometry, the point that divides a line or arc into two equal lengths. [1/2 definitions] |

minute^{1} |
in geometry, a unit of measure equal to one sixtieth of a degree of angle or arc. [1/6 definitions] |

octant |
an eighth of a circle, or the arc or area it includes. [1/4 definitions] |

quadrant |
one quarter of the arc of a circle. [2/5 definitions] |

rainbow |
an arc in the sky containing the colors of the visible spectrum, which results from the shining of sunlight on water droplets during or after a rain. [1/2 definitions] |

right ascension |
the angular distance of the arc of one of the hour circles of a celestial body, measured eastward along the equator from the vernal equinox to the intersection of the hour circle, and expressed in degrees or hours; the celestial equivalent of longitude. |

second^{2} |
in geometry, a unit of measure equal to one sixtieth of a minute of angle or arc. [1/3 definitions] |

sector |
in geometry, a figure shaped like a piece of pie and determined by an arc of a circle and the two radii that intersect the endpoints of it. [1/4 definitions] |