Definition of water thyme in English:

water thyme

noun

  • Any of several aquatic plants with whorls of small leaves around the stem and inconspicuous flowers; especially. Canadian pondweed, Elodea canadensis, and the related waterweed Hydrilla verticillata.

Origin

Mid 17th century (in an earlier sense). From water + thyme.

Pronunciation

water thyme

/ˈwɔːtə ˌtʌɪm/