thyridium

noun

thy·​rid·​i·​um
-dēəm
plural thyridia
-ēə
1
: a pale spot in the wing vein of some insects especially of the orders Hymenoptera and Trichoptera
2
: one of a pair of oval pits on the second abdominal tergite of some hymenopterans

Word History

Etymology

New Latin, from Greek thyridion window, diminutive of thyra door

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!

Dictionary Entries Near thyridium

Cite this Entry

“Thyridium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thyridium. Accessed 29 May. 2024.

Love words? Need even more definitions?

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