A navigational device for deriving angular distances between objects so as to determine latitude and longitude.
One sixth of a circle or disc; a sector with an angle of 60°.
One of six groups of adjacent teeth, excluding the wisdom teeth. The front sextants go from canine to canine, and there are sextants on the right and left of these. See w:Periodontal examination.
An astronomical and navigational instrument for gauging the altitude of the Sun and stars.
an instrument with a graduated arc of 60° and a sighting mechanism, used for measuring the angular distances between objects and especially for taking altitudes in navigation and surveying.
An instrument for measuring angular distances between objects, - used esp. at sea, for ascertaining the latitude and longitude. It is constructed on the same optical principle as Hadley's quadrant, but usually of metal, with a nicer graduation, telescopic sight, and its arc the sixth, and sometimes the third, part of a circle. See Quadrant.
The constellation Sextans.
An instrument for observing or showing the positions of the stars. It is now disused.
A stereographic projection of the sphere on the plane of a great circle, as the equator, or a meridian; a planisphere.
A navigational device for deriving angular distances between objects so as to determine latitude and longitude.
One sixth of a circle or disc; a sector with an angle of 60°.
One of six groups of adjacent teeth, excluding the wisdom teeth. The front sextants go from canine to canine, and there are sextants on the right and left of these. See w:Periodontal examination.
An astronomical and navigational instrument for gauging the altitude of the Sun and stars.
an instrument with a graduated arc of 60° and a sighting mechanism, used for measuring the angular distances between objects and especially for taking altitudes in navigation and surveying.
An instrument for measuring angular distances between objects, - used esp. at sea, for ascertaining the latitude and longitude. It is constructed on the same optical principle as Hadley's quadrant, but usually of metal, with a nicer graduation, telescopic sight, and its arc the sixth, and sometimes the third, part of a circle. See Quadrant.
The constellation Sextans.
An instrument for observing or showing the positions of the stars. It is now disused.
A stereographic projection of the sphere on the plane of a great circle, as the equator, or a meridian; a planisphere.