Definition/Meaning  Word/Phrase 
radar that will report altitude as well as azimuth and distance of a target 
3d radar
,
threedimensional radar

(astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth 
absolute magnitude

trapped air that supports a hovercraft a short distance above the water or ground 
air cushion

unit of length used in navigation; equivalent to the distance spanned by one minute of arc in latitude; 1,852 meters 
air mile
,
international nautical mile
,
knot
,
mi
,
mile
,
nautical mile
,
naut mi

distance oneself from an attachment, especially through hostile actions 
alienate

angular distance above the horizon (especially of a celestial object) 
ALT
,
altitude
,
EL
,
elevation

perpendicular distance from the base of a geometric figure to opposite vertex (or side if parallel) 
altitude

product of the momentum of a rotating body and its distance from the axis of rotation 
angular momentum

(astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun) 
anomaly

apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun 
aphelion

apoapsis in Earth orbit; the point in its orbit where a satellite is at the greatest distance from the Earth 
apogee

unit of angular distance equal to a 60th of a degree 
arcminute
,
minute
,
minute of arc

distance sufficient to exclude intimacy 
arm's length

unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers) 
Astronomical Unit
,
AU

angular distance from a reference direction 
azimuth

fire (usually on a hill or tower) that can be seen from a distance 
beacon
,
beacon fire

situation or topic as if viewed from an altitude or distance 
bird's eye view
,
panoramic view

instrument for measuring the distance between two points (often used in the plural) 
caliper
,
calliper

small chiefly ground dweller that stays within easy jumping distance of water; of United States southwest and northern Mexico 
canyon treefrog
,
Hyla arenicolor

one of the coordinates in a system of coordinates that locates a point on a plane or in space by its distance from two lines or three planes respectively; the two lines or the intersections of the three planes are the coordinate axes 
Cartesian coordinate
