Saint Mark's fly

\ -ˈmärks- \

Definition of Saint Mark's fly

: a large black angular European bibionid fly (Bibio marci) that usually emerges about the end of April

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for Saint Mark's fly

after St. Mark the Evangelist, whose feast day is April 25

Keep scrolling for more

Learn More about Saint Mark's fly

Statistics for Saint Mark's fly

Cite this Entry

“Saint Mark's fly.” Dictionary, Merriam-Webster, Accessed 25 Oct. 2020.

Comments on Saint Mark's fly

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


Test Your Vocabulary

Namesakes Word Quiz

  • a citrus fruit possibly named after a person
  • Which of the following is a fruit named after a Moroccan seaport?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

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

Love words? Need even more definitions?

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