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infectious

in·fec·tious

infectious

 
 
pronunciation:
ihn fek shs
features:
Word Explorer
part of speech: adjective
definition 1: capable of being transmitted by infection.
The passengers were kept in quarantine because their disease was infectious.
synonyms:
communicable, contagious, transmissible
similar words:
catching, pestilent, septic, toxic, virulent
definition 2: easily communicated to and affecting others, as though by contagion.
The desk clerk's infectious smile brought a cheery expression to most of the guest's faces.
synonyms:
catching, contagious
similar words:
communicable, compelling, epidemic, irresistible
derivations: infectiously (adv.), infectiousness (n.)
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See
  disease, virus