porcupine grass

noun

1

: a tall stout grass (Stipa spartea) of the western U.S. that has grains with long hygroscopic awns which by their twisting and untwisting often penetrate the wool and even the flesh of sheep and that affords good forage and hay

2

: spinifex sense 2

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!