Ring flash
noun
1.
(photog) a type of electronic flash in which the light source is arranged in a ring around the lens in order to produce a light without shadows
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- Ring-frame
noun 1. ring-spinning frame. ring-spinning frame [ring-spin-ing] /ˈrɪŋˌspɪn ɪŋ/ noun 1. a machine containing the ring, traveler, and bobbin used in spinning yarn.
- Ring-gage
noun 1. a gage for checking the diameters of circular manufactured objects, consisting of a ring having a hole that is of either the maximum or minimum allowable diameter.
- Ring-galaxy
noun, Astronomy. 1. a galaxy having the shape of an elliptical ring: thought to be the result of a collision of two galaxies.
- Ring-gate
noun, Metallurgy. 1. a gate having a widened opening containing a centered disk to prevent molten metal from falling in a direct vertical stream.
- Ring-gear
noun, Machinery. 1. internal gear. internal gear noun, Machinery. 1. a gear having teeth cut on an inner cylindrical surface.