Definition of mat-grass in English:

mat-grass

noun

  • 1A wiry, densely tufted grass, Nardus stricta, often dominating acid heaths and moorland in Europe and temperate Asia (also "moor mat-grass").

  • 2(More fully "sea mat-grass") marram grass, Ammophila arenaria.

Origin

Late 18th century; earliest use found in John Lightfoot (1735–1788), Church of England clergyman and naturalist.