collimator
(noun) optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens; light rays leave the slit as a parallel beam
collimator
(noun) a small telescope attached to a large telescope to use in setting the line of the larger one
Source: WordNet® 3.1
collimator (plural collimators)
(physics) An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence.
(physics) A similar device that produces a parallel beam of particles such as neutrons.
(astronomy) A small telescope attached to a larger one, used to point it in the correct general direction.
• microatoll, mortal coil
Source: Wiktionary
Col"li*ma`tor, n.
1. (Astron.)
Definition: A telescope arranged and used to determine errors of collimation, both vertical and horizontal. Nichol.
2. (Optics)
Definition: A tube having a convex lens at one end and at the other a small opening or slit which is at the principal focus of the lens, used for producing a beam of parallel rays; also, a lens so used.
Source: Webster’s Unabridged Dictionary 1913 Edition
4 April 2025
(verb) kill by cutting the head off with a guillotine; “The French guillotined many Vietnamese while they occupied the country”
The word “coffee” entered the English language in 1582 via the Dutch “koffie,” borrowed from the Ottoman Turkish “kahve,” borrowed in turn from the Arabic “qahwah.” The Arabic word qahwah was traditionally held to refer to a type of wine.
