cylinder |
in geometry, a surface or volume described by a straight line tracing a closed curve, esp. a circle, at a fixed angle, usu. a right angle, in two parallel planes. [1/5 definitions] |

declination |
the horizontal angle between magnetic north and true north at any given point on the earth's surface. [1/5 definitions] |

deflection |
the amount or angle by which something is deflected. [1/3 definitions] |

diatropism |
the tendency of some plant organs to assume a position at a right angle to the direction of an external stimulus. |

dihedral |
the angle formed by two intersecting planes. [1/2 definitions] |

dogleg |
something bent at a sharp angle, esp. a road or a golf fairway with a sharp curve. [2 definitions] |

ellipse |
a closed geometric plane curve formed by the intersection of a plane at an oblique angle to the axis and opposite sides of a right circular cone; an oval conic section. [1/2 definitions] |

exterior angle |
the outside angle formed by the extension of one side of a polygon and the side adjacent to it. [1/2 definitions] |

facet |
an angle, aspect, or phase, as of a problem or situation. [1/4 definitions] |

fisheye lens |
a wide-angle camera lens that covers a full 180 degrees, producing images characterized by peripheral distortion and dramatically foreshortened perspective. |

Fresnel mirrors |
two mirrors joined together at an angle slightly less than 180 degrees, so that a beam of light falling on them is reflected in different directions, producing interference fringes where the reflected light overlaps. |

gimlet |
a tool used to make holes, consisting of a shaft with a sharp, spiral tip attached to a handle at a right angle. [1/3 definitions] |

glance |
to strike something at an angle and be turned aside. [1/6 definitions] |

goniometer |
an electrical device, consisting of a radio receiver and antenna, used to determine the direction and angle of incoming radio signals. [1/2 definitions] |

heading |
in aeronautics, the direction an aircraft is pointing, expressed as the angle between the aircraft's axis and magnetic north. [1/3 definitions] |

hip^{1} |
the projecting angle formed by the junction of two slopes of a roof. [1/4 definitions] |

hook |
a sharp bend, curve, or angle in the course or length of something, such as a river, a road, or a piece of land next to water. [2/19 definitions] |

hypotenuse |
in a right triangle, the side opposite the right angle. |

inclined |
at an angle from a horizontal or vertical position; slanted; sloping. [1/2 definitions] |

inclined plane |
a plane surface inclined at less than a right angle to a horizontal surface, used to roll or slide a load up or down. |

inscribe |
to construct (a polygon or angle) within a circle, or to construct (a circle) within a polygon. [1/5 definitions] |