Medical Dictionary

sputum

noun spu·tum \ˈsp(y)üt-əm\
plural spu·ta \-ə\

Medical Definition of SPUTUM

:  matter expectorated from the respiratory system and especially the lungs and bronchi in diseased states that is composed chiefly of mucus but may contain pus, blood, fibrin, or microorganisms (as bacteria)

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