background level
— Noun
– English
～ the amplitude level of the undesired background noise
biosafety level 3
— Noun
– English
～ exposure to infectious agents that can be transmitted by the respiratory route and which can cause serious infection
biosafety level 4
— Noun
– English
～ exposure to exotic infectious agents that pose a high risk of life-threatening disease and can be transmitted as an aerosol and for which there is no vaccine or therapy
biosafety level 2
— Noun
– English
～ exposure to infectious agents that can cause disease in humans but whose potential for transmission is limited
biosafety level
— Noun
– English
～ the level of safety from exposure to infectious agents; depends on work practices and safety equipment and facilities
biosafety level 1
— Noun
– English
～ exposure only to infectious agents that do not ordinarily cause human disease
brightness level
— Noun
– English
～ the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun"