plural noun Psi·lo·ta·ce·ae \ˌsīlōˈtāsēˌē\

Definition of Psilotaceae

  1. :  a family of plants that are usually placed in order Psilotales and are characterized by nearly naked stems, minute scalelike leaves, and 2- or 3-celled sporangia — compare psilotum, tmesipteris



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 psilotaceae

New Latin, from Psilotum, type genus + -aceae

Seen and Heard

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


a rounded knoll or a ridge of ice

Get Word of the Day daily email!