Thoracostei

plural noun Tho·ra·cos·tei \ˌthōrəˈkästēˌī, ˌthȯr-\

Definition of Thoracostei

in some classifications

  1. :  an order comprising fishes with the body more or less completely covered by bony plates and the pharyngeal bones and other structures about the head more or less undeveloped and including the sticklebacks, pipefishes, and sea horses

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.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of thoracostei

New Latin, from thorac- + -ostei (from Greek osteon bone) — more at osseous


Seen and Heard

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

WORD OF THE DAY

a brief usually trivial fact

Get Word of the Day daily email!