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background radiation
geol.	radiación natural
health.	radiación de fondo; radiación ambiente
radiol.	radiación de ambiente
tech.	radiación ambiental
background radiation Radiation resulting from natural sources, as opposed to man-made sources, and to which people are exposed in everyday, normal life; for example from rocks and soil
environ.	radiación de fondo
English thesaurus
background radiation
mil., logist.	Nuclear or ionizing radiations arising from within the body itself or from the environment to which individuals are constantly exposed. (FRA)

background radiation: 5 phrases in 4 subjects

Environment	2
Life sciences	1
Natural sciences	1
Remote sensing	1