Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. See darnel.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of several species of tufted grasses of the genus, Lolium.
  • n. A collection of plants of any of the species, as in a lawn or field.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any of several annual or perennial Eurasian grasses

Etymologies

Alteration of raygrass : ray, darnel (from Middle English rai, perhaps alteration of Old French ivraie, from Latin ēbriāca, from feminine of ēbriācus, drunk (from the plant's effects if ingested), from ēbrius; see inebriate) + grass.
(American Heritage® Dictionary of the English Language, Fourth Edition)
rye +‎ grass (Wiktionary)

Examples

  • The local grass in Fort Myers is a very stiff broad-bladed variety, but we plant our test fields with annual ryegrass, which is more like the grass most mowers deal with throughout the rest of the country.

    Inside Consumer Reports Test Labs: Mower and tractor testing in Florida

  • One of the problems with forage crops such as ryegrass and clover is that they have too much lignin, which can cause ruminants like cows to get sick.

    CattleNetwork

  • The exact projects TGAC will start work on will be determined by an independent Scientific Advisory Board, but future projects could include economically important organisms such as ryegrass for sustainable bioenergy production, the tomato to understand its anti-cancer properties and the sheep to help farmers develop disease resistant breeds.

    Health News from Medical News Today

  • I'd paint the walls something pretty and fresh, like a green, maybe 'ryegrass' from behr.

    Apartment Therapy Main

  • Allergies to dogs, cockroaches, shrimp, ryegrass, Bermuda grass, birch, certain fungi and thistle also were more common in youths with the lowest Vitamin D levels.

    Vitamin D deficiency may be a factor in development of allergies

  • There's a grim ring of truth to the episodes in which Mattie and her siblings make their own entertainment watching insects skitter across the surface of a septic tank; and there's no doubt that she knows her stuff when it comes to discussing tetraploid Italian ryegrass and distinctly unorganic compounds with names such as Promax.

    Hill Farm by Miranda France – review

  • Deryl thought it a good idea to sow ryegrass around the house in the fall and clover the next spring.

    Bird Cloud

  • PUT DOWN ROOTS: Sow clover, wheat, or ryegrass after 24 to 48 hours, then wait.

    What You Need to Hunt Early-Season Bucks

  • SWEETEN THE PLOT: Plant clover or ryegrass in a small strip around the pond to stabilize the banks and give deer something to nibble on.

    What You Need to Hunt Early-Season Bucks

  • Grasses such as deer-tongue grass (Panicum clandestinum L.) and switchgrass (Panicum virgatum L.) tolerate more acidic conditions than tall fescue (Festuca arundinacea L.) and perennial ryegrass (Lolium perenne L.).

    Offsetting carbon dioxide emissions through minesoil reclamation

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