'Pertussis' definitions:

Definition of 'pertussis'

(from WordNet)
noun
A disease of the respiratory mucous membrane [syn: whooping cough, pertussis]

Definition of 'Pertussis'

From: GCIDE
  • Pertussis \Per*tus"sis\, n. [NL., fr. L. per through, very + tussis cough.] (Med.) The whooping cough. [1913 Webster]