buildup(redirected from build-up)
Also found in: Dictionary, Thesaurus, Idioms, Encyclopedia.
Related to build-up: Built-up area
buildupAn increase in absorbed dose of radiation with depth below the surface in a radiated material by a beam of X-rays or gamma rays.
Electron buildup—Due to an increasing electron flux in the material, which is more important for high energy beams.
Photon buildup—Due to scattering in broad beams of radiation.