Definition of water-liverwort in US English:

water-liverwort

noun

  • Any of various liverworts (bryophytes) of damp or aquatic habitats; (in later use) specifically = crystalwort.

Origin

Late 16th century; earliest use found in Henry Lyte (1529–1607), botanist and antiquary. From water + liverwort, apparently originally after Dutch water leverkruid.