Definition of anallatic in English:

anallatic

(also anallactic)

adjective

Surveying
  • Of a surveying telescope: having an additional lens between the eyepiece and the object lens, positioned to enable the horizontal distance to be calculated from the slant distance without the need for a correcting factor; (of a lens) serving to make a telescope anallatic.

Origin

Late 19th century. From French anallatique, with remodelling of the ending after -ic.

Pronunciation

anallatic

/anəˈlatɪk/