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streptococcus

noun [C]
 
 
/ˌstrep.təˈkɒk.əs/ US  /-ˈkɑː.kəs/ (plural streptococci) (mainly US informal strep /strep/) specialized

Definition

a bacterium, many types of which cause disease: Tonsillitis is normally caused by infection with streptococci.Bacteria, moulds, germs and viruses streptococcal
 
 
/-ˈkɒk.l̩/ US  /-ˈkɑː.kl̩/ adjective
Pneumonia tends to be caused by streptococcal or viral infection.Bacteria, moulds, germs and viruses
(Definition of streptococcus noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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