onion-couch

A farmer examines an onion-couch plant growing at the edge of his field.

Definition

1. Noun:
   • A type of wild grass: "onion-couch" refers to a species of wild grass, specifically Arrhenatherum elatius subsp. bulbosum, also known as false oat-grass or onion couch. It is characterized by its bulbous base, which resembles an onion, and is considered a weed in agricultural settings.

Usage Examples

• Noun:
  • The farmer struggled to control the spread of onion-couch in his wheat field. (A persistent wild grass that competes with crops.)
  • Onion-couch can be identified by its small, onion-like bulbs at the base of the stems. (A distinctive feature of this wild grass.)

Advanced Usage

• "onion-couch infestation": a situation where this grass grows excessively and harms cultivated plants.
  • The pasture was overrun with an onion-couch infestation, reducing the quality of hay. (Excessive growth of this weed.)

Variants and Related Words

• Onion-grass (n): another common name for the same plant.

  • Onion-grass is difficult to eradicate once established. (Synonym for onion-couch.)

• Onion-twich (n): an alternative term for the same species.

  • The onion-twich spreads rapidly through its underground bulbs. (Another name for this wild grass.)

Synonyms

• False oat-grass: a common name for Arrhenatherum elatius subsp. bulbosum.

  • False oat-grass is often confused with other grass species. (Synonym for onion-couch.)

• Bulbous oat-grass: a descriptive term highlighting its bulbous roots.

  • Bulbous oat-grass can choke out desirable plants. (Alternate name.)

Related Idioms

• "A weed in the garden": a phrase used to describe something undesirable or invasive.
  • Onion-couch is truly a weed in the garden of agriculture. (An unwanted element in a cultivated area.)

Phrasal Verbs

• "Couch out": (rare, non-standard) to remove or suppress onion-couch.
  • The gardener worked to couch out the onion-couch before planting vegetables. (To eliminate this weed.)