Definition of metaphyton in US English:

metaphyton

noun

Limnology
  • Aggregated freshwater algae that are not attached to a substrate; (originally) specifically those found between or loosely associated with water plants.

Origin

1960s; earliest use found in Frank Eric Round (b. 1927). From German Metaphyton from meta- + ancient Greek ϕυτόν a plant, perhaps after periphyton.

Pronunciation

metaphyton

/ˌmɛtəˈfʌɪtɒn/