infectivity

noun
in·​fec·​tiv·​i·​ty | \ ˌin-ˌfek-ˈtiv-ət-ē How to pronounce infectivity (audio) \
plural infectivities

Medical Definition of infectivity

: the quality of being infective : the ability to produce infection specifically : a tendency to spread rapidly from host to host — compare virulence sense b

Learn More about infectivity

Cite this Entry

“Infectivity.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/infectivity. Accessed 5 Jul. 2020.

Comments on infectivity

What made you want to look up infectivity? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

A More Exception(al) Quiz

  • hot dog  hot dog  hot dog  hot dog cat
  • Which of the following words is not a synonym for ‘a young person’?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!