Definition of reticle in English:



  • A series of fine lines or fibres in the eyepiece of an optical device, such as a telescope or microscope, or on the screen of an oscilloscope, used as a measuring scale or an aid in locating objects.

    • ‘The rifle sent forth an azure beam of energy that pierced the hologram cleanly where the reticle had been; the target disappeared and registered a hit.’
    • ‘Even autocollimators with micrometer-driven reticles used with averaged multiple readings require a skilled operator to achieve accurate, repeatable results.’
    • ‘With the default set up, your vehicle will align itself to manoeuvre to wherever you aim the targeting reticle with the mouse, while the keyboard controls forward and reverse propulsion.’
    • ‘Several different reticles are available that are tailored to the type of long range shooting envisioned.’
    • ‘In fact, the extremely complex reticles that will be required to extend optical lithography below 100 nm will make the cost of ownership impractical for low-volume applications.’


Mid 18th century: from Latin reticulum ‘net’.