1. A British weed, so denominated from the joints of the stem.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• jnotgrass,
• mnotgrass,
• lnotgrass,
• onotgrass,
• inotgrass,
• kbotgrass,
• kmotgrass,
• kjotgrass,
• khotgrass,
• knitgrass,
• knktgrass,
• knltgrass,
• knptgrass,
• kn0tgrass,
• kn9tgrass,
• knottgrass,
• knotgrasse,
• knot grass,
• knott-grass,
• knotgrassse

• outgrows,
• Negroes,
• knotts,
• notorious.

The adjective form of the word "knotgrass" is "knotgrassy".

The plural of the "knotgrass" can be the "knotgrasses".

The singular of the "knotgrass" can be the "knotgrass".