See meteor spectrography
noun, Astronomy. 1. any large number of meteoroids moving in parallel paths.
[mee-ter] /ˈmi tər/ noun 1. the fundamental unit of length in the , equivalent to 39.37 U.S. inches, originally intended to be, and being very nearly, equal to one ten-millionth of the distance from the equator to the pole measured on a meridian: defined from 1889 to 1960 as the distance between two lines on […]
[mee-ter-ij] /ˈmi tər ɪdʒ/ noun 1. the practice of measuring; measurement. 2. a sum or price charged for measurement.
- Meter angle
meter angle n. The unit of ocular convergence equal to the amount of convergence required to view binocularly an object at 1 meter and exerting 1 diopter of accommodation.