biosafety level 3 biosafety level 2 • biosafety level 4 · · · Info · Definitions · Characters · · biosafety level 3 · · Text Common · · Latin · · Scripts 17 · · Length 7 · · Syllables Definitions · · · (noun) exposure to infectious agents that can be transmitted by the respiratory route and which can cause serious infection. Synonyms: biosafety level 3. · · Noun Definition 1 Characters · · space U+0020 3 digit three U+0033 a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 v latin small letter v U+0076 y latin small letter y U+0079