blackfly

noun black·fly \ ˈblak-ˌflī \

Definition of blackfly

plural blackflies or blackfly
: any of various small dark-colored insects; especially : any of a family (Simuliidae and especially genus Simulium) of bloodsucking dipteran flies whose larvae usually live in flowing streams

Recent Examples of blackfly from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'blackfly.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of blackfly

15th century

in the meaning defined above

See Words from the same year
NEW! Time Traveler

BLACKFLY Defined for English Language Learners

blackfly

Definition of blackfly for English Language Learners

  • : a small fly that bites


Medical Dictionary

blackfly

noun black·fly \ ˈblak-ˌflī \

medical Definition of blackfly

plural blackflies
: any of a family (Simuliidae) and especially genus Simulium of bloodsucking dipteran flies

Learn More about blackfly


Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

having an air of easy unconcern

Get Word of the Day daily email!

Test Your Vocabulary

The Eponym Quiz

  • rubens-painting
  • Which is the best synonym of bowdlerize?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

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!