Mi·​as·​tor | \ mīˈastə(r)\

Definition of Miastor

: a genus of flies (family Cecidomyiidae) that are remarkable for their parthenogenetic and paedogenetic reproduction by which the larva on hatching from the egg develops internally a brood of similar larvae that on escaping may repeat the process for several generations before pupation and development of mature individuals

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 Miastor

New Latin, from Greek miastōr one that defiles; akin to Greek miainein to defile

Keep scrolling for more

Comments on Miastor

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


a usually brief trip or an expedition

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

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!