1. any of various small weedy plants of the genus Lechea, having small leaves and tiny flowers
Usage: botanical

Examples

• The sandy soil was covered with pinweed and other hardy plants.
• Pinweed thrives in poor, dry conditions where other plants struggle.
• The botanist identified several species of pinweed in the coastal dunes.
• Small clusters of pinweed dotted the abandoned field.
• The tiny flowers of pinweed are easily overlooked by casual observers.