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PROTRACTOR |
Instrument for measuring angles |
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SEMICIRCLE |
An instrument for measuring angles. |
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ANGULOMETER |
An instrument for measuring external angles. |
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PANTOMETER |
An instrument for measuring angles for determining
elevations, distances, etc. |
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LIMB |
The graduated margin of an arc or circle, in an instrument
for measuring angles. |
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HALOMETER |
An instrument for measuring the forms and angles of
salts and crystals; a goniometer. |
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GONIOMETER |
An instrument for measuring angles, especially the
angles of crystals, or the inclination of planes. |
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COSMOLABE |
An instrument resembling the astrolabe, formerly used
for measuring the angles between heavenly bodies; -- called also
pantacosm. |
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DEMICIRCLE |
An instrument for measuring angles, in surveying, etc.
It resembles a protractor, but has an alidade, sights, and a compass. |
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OCTANT |
An instrument for measuring angles (generally called a
quadrant), having an arc which measures up to 9O¡, but being itself the
eighth part of a circle. Cf. Sextant. |
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RECIPIANGLE |
An instrument with two arms that are pivoted together
at one end, and a graduated arc, -- used by military engineers for
measuring and laying off angles of fortifications. |
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MICROMETER |
An instrument, used with a telescope or microscope, for
measuring minute distances, or the apparent diameters of objects which
subtend minute a... |
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EQUATORIAL |
An instrument consisting of a telescope so mounted as
to have two axes of motion at right angles to each other, one of them
parallel to the axi... |