Definition of epiphyllum in US English:

epiphyllum

noun

  • A cactus with flattened stems and large, fragrant red or yellow flowers.

    Genus Epiphyllum, family Cactaceae: several species, in particular the night-flowering cactus (E. hookeri)

    • ‘The epiphyllum loves filtered sunshine and enjoys humidity.’
    • ‘Epiphyllums, commonly referred to as Epis, or Orchid cacti, have tremendous blooms.’

Origin

Modern Latin, from epi- ‘upon’ + Greek phullon ‘leaf’.

Pronunciation

epiphyllum

/ˌepəˈfiləm//ˌɛpəˈfɪləm/