biosafety level 3 is a noun meaning "exposure to infectious agents that can be transmitted by the respiratory route and which can cause serious infection". It carries one recorded sense.
exposure to infectious agents that can be transmitted by the respiratory route and which can cause serious infection
Definitions, synonyms and semantic relations for biosafety level 3 come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.