knotgrass noun.
['nɒtgrɑ:s] E16.[from KNOT noun1 + GRASS noun.]1. Any of several weeds of the genus
Polygonum (family Polygonaceae), esp.
Polygonum aviculare, with wiry jointed creeping stems and small pinkish or whitish flowers in the axils of the leaves.
E16.2. Any of various other plants with jointed stems;
spec. (a) fiorin grass,
Agrostis stolonifera;
(b) US joint-grass,
Paspalum distichum;
(c) a variety of false oat with swollen basal internodes,
Arrhenatherum elatius subsp.
bulbosum.
L16.whorled knotgrass a small creeping plant of damp sandy places,
Illecebrum verticillatum, of the pink family.
3. Either of two small noctuid moths,
Acronicta rumicis, and (in full
light knotgrass)
A. menyanthidis. Also
knotgrass moth.
E19. [TahlilGaran] English Dictionary ▲