Declination
71parallel of declination — one of the small circles of the celestial sphere that is parallel to the celestial equator * * * parallel of declination, Astronomy. any imaginary circle whose plane is parallel to the celestial equator …
72circle of declination — Astron. See hour circle. [1585 95] * * * circle of declination, Astronomy. a great circle of the sphere, the plane of which is perpendicular to the equator …
73circle of declination — Astron. See hour circle. [1585 95] * * * …
74magnetic declination — Navig. variation (def. 8). * * * …
75angle of declination — Mikulicz a …
76magnetic declination — The angle between the magnetic and geographical meridians at any place, expressed in degrees east or west to indicate the direction of magnetic north from true north. Also called a magnetic variation …
77station declination — An alignment variation between the zero degree radial of a VOR and true north, determined at the time the VOR station is calibrated (ICAO). VOR stands for very high frequency omnidirectional radio range …
78co-declination — …
79Dec. — • declination …
80d — • declination change in 1 hour (astronomical); • altitude difference; • diameter of a valve inlet in inches …