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 collimator collimator /ˈkɒlɪˌmeɪtər/

noun

  1. 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 )
    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
     The scientist used the collimator to ensure the light rays were parallel before entering the experimental chamber.
    The scientist used the collimator to ensure the light rays were parallel before entering the experimental chamber.
  2. A small telescope attached to a large telescope to use in setting the line of the larger one  ( collimator )
    a small telescope attached to a large telescope to use in setting the line of the larger one
     The astronomer adjusted the collimator to ensure the telescope was correctly aligned.
    The astronomer adjusted the collimator to ensure the telescope was correctly aligned.


 aircraft aircraft /ˈɛrˌkræft/

noun

  1. () A vehicle that can fly  ( aircraft )
    a vehicle that can fly
     The new aircraft is equipped with the latest technology
    The new aircraft is equipped with the latest technology


 genus Peziza genus Peziza /ˈdʒiːnəs pɛˈziːzə/

noun

  1. Type genus of the Pezizaceae: a variety of cup fungus  ( genus Peziza , Peziza )
    type genus of the Pezizaceae: a variety of cup fungus


 Crotalus tigris Crotalus tigris /krə'tæləs 'taɪgrɪs/

noun

  1. Having irregularly cross-banded back; of arid foothills and canyons of southern Arizona and Mexico  ( Crotalus tigris , tiger rattlesnake )
    having irregularly cross-banded back; of arid foothills and canyons of southern Arizona and Mexico