The Collaborative International Dictionary
Infectiously
Infectiously \In*fec"tious*ly\, adv.
In an infectious manner.
--Shak.
Wiktionary
infectiously
adv. In an infectious manner.
WordNet
infectiously
adv. in a contagious manner; "she was contagiously bubbly" [syn: contagiously]
Usage examples of "infectiously".
Suddenly she grinned at Jaxom so infectiously that he responded with a broad smile.