plural antecostae or antecostas
: the internal ridge that is externally manifested as a groove, that appears near the anterior margin of the typical dorsal or ventral plate of the primitive segment of an arthropod, and that provides attachment for the longitudinal muscles

Word History


New Latin, from ante- + costa

First Known Use

1826, in the meaning defined above

Time Traveler
The first known use of antecosta was in 1826

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 antecosta

Cite this Entry

“Antecosta.” Dictionary, Merriam-Webster, Accessed 25 May. 2024.

Love words? Need even more definitions?

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