ISOCHROMAT

| ̷ ̷ ̷ ̷krō|mat, ˌ ̷ ̷ ̷ ̷ˈkrōˌm- noun

( -s )

Etymology: is- + -chromat (from Greek chrōmat-, chrōma color) — more at chromatic

: a graph showing intensity as a function of voltage for a given wavelength of the output from an X-ray source