Definition of pearl weed in English:

pearl weed

noun

  • 1Pearlwort.

  • 2An aquatic plant, Hemianthus micranthemoides (family Scrophulariaceae), of Cuba and the south-eastern United States, often planted in aquaria.

Origin

Late 19th century; earliest use found in George Nicholson (1847–1908), gardener and botanist.