DX code - definition of DX code by The Free Dictionary
(Photography) photog a code on a film cassette that automatically adjusts the film-speed setting on a suitably equipped camera to the correct ISO rating
[C20: from d(aylight) (e)x(posure)]
References in periodicals archive
The unit also has a zoom lens, high-grade color scanner, automatic negative carrier, DX code
reader and a frame number printing system.
Notwithstanding that Respondent was given the opportunity to make a post-hearing submission in support of its excessive charge defense, it declined to avail itself of the chance, contending instead that it was unable to do so without a proper NF3/Bill which include the dx codes
and CPT codes, an item that I duly note the insurer never sought as additional verification of the claim.