Pycnogonida

plural noun Pyc·no·gon·i·da \ˌpiknəˈgänədə\

Definition of Pycnogonida

  1. :  a class of marine arthropods that superficially resemble spiders with the body relatively very thin and small, the legs usually excessively long and slender, and the abdomen rudimentary, that have typically seven pairs of appendages of which the posterior four pairs are legs and contain diverticula of the intestine and reproductive organs and of which the first two or three pairs are often absent, a triangular mouth at the end of a tubular proboscis, no organs of respiration, and separate sexes, and that produce young which usually pass through a metamorphosis

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 pycnogonida

New Latin, from Pycnogonum, genus of sea spiders (from pycn- + Greek gony knee) + -ida — more at knee


Seen and Heard

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

WORD OF THE DAY

feeling or affected by lethargy

Get Word of the Day daily email!