Definition of "knotgrass" []

• A low-growing, weedy grass (Paspalum distichum) with spikelets arranged in two rows along the rachis. (noun)
• Any of several weedy plants of the genus Polygonum having stems with nodes. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "But the young woman stood, trying to continue chopping the knotgrass."
• "Soon the sound of those words had grown in the field as thick as knotgrass, as thick as cotton."
• "Leonoa had survived by a blade-thin chance, and even so, she lay four days in a stupor, waking for an evening before lapsing into bone fever, its delirious contortions permanently thwarting her spine's straightness, lengthening one arm and legs, and throwing the plates of her skull awry, gnarling her like a knotgrass doll."