Definition of waterwort in US English:

waterwort

noun

  • 1Either of two ferns with delicate fronds, the maidenhair fern, Adiantum capillus-veneris, and maidenhair spleenwort, Asplenium trichomanes (now regional). Formerly also occasionally: †a water dropwort, genus Oenanthe (obsolete).

  • 2Any small aquatic flowering plant of the genus Elatine (family Elatinaceae), typically found in or at the edge of shallow water, and sometimes grown in aquaria.

Origin

Old English; earliest use found in Pseudo-Apuleius' Herbarium. From water + wort.

Pronunciation

waterwort

/ˈwɔːtəwəːt/