isoetes

noun

iso·​etes

īˈsōəˌtēz

1

capitalized : a large widely distributed genus (coextensive with the family Isoetaceae) of fern allies comprising the aquatic or marsh-growing quillworts that have a short buried lobed stem from which arises a tuft of quilt-shaped leaves bearing sporangia in their axils see isoetales

2

plural isoetes : any plant of the genus Isoetes : quillwort sense 1

Word History

Etymology

New Latin, from Latin, houseleek, from Greek, from neuter of isoetēs equal in years, from is- + etos year

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!