Definition of coolwort in US English:

coolwort

noun

North American
  • Any of several small North American plants of the family Saxifragaceae, especially foamflowers (genus Tiarella) (also "coolwort foamflower") and mitreworts (genus Mitella).

Origin

Mid 19th century; earliest use found in John R. Bartlett (1805–1886), ethnologist and historian. From cool + wort. The reason for the name is uncertain.

Pronunciation

coolwort

/ˈkuːlwəːt/