Relative abundance
noun
the number of organisms of a particular kind as a percentage of the total number of organisms of a given area or community; the number of birds of a particular species as a percentage of the total bird population of a given area
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- Relative address
noun See absolute address
- Relative-aperture
noun, Optics. 1. the ratio of the diameter of a lens, especially a camera lens, to the focal length; the reciprocal of the f number or focal ratio of the lens. relative aperture noun 1. (photog) the ratio of the equivalent focal length of a lens to the effective aperture of the lens; written as […]
- Relative atomic mass
noun 1. the ratio of the average mass per atom of the naturally occurring form of an element to one-twelfth the mass of an atom of carbon-12 Ar, r.a.m. Former name atomic weight relative atomic mass (rěl’ə-tĭv) See atomic weight.
- Relative-bearing
noun, Navigation. 1. the bearing of an object, relative to the heading of a vessel or aircraft.