Definition of paraphyllium in US English:

paraphyllium

noun

Botany
  • (In certain mosses and liverworts) a small, finely-divided, leaf-like structure on the stem between leaves.

Origin

Mid 19th century; earliest use found in John Lindley (1799–1865), botanist and horticulturist. From scientific Latin paraphyllium from para- + ancient Greek ϕύλλον leaf + classical Latin -ium.