Definition of epilithic in English:

epilithic

adjective

Botany
  • (of a plant) growing on the surface of rock.

    ‘most seaweeds are epilithic’
    • ‘We have virtually no fossils of tropical fleshy algae, especially the small soft epilithic species that characterize primary productivity on modern reefs.’
    • ‘We investigated the importance of snowmelt as an organizing factor for epilithic microalgae in a high-altitude montane stream during 3 yr of differing melt characteristics.’
    • ‘This community is also characterized by a high epiphytic and epilithic cover.’

Origin

Early 20th century: from epi- ‘upon’ + Greek lithos stone + -ic.

Pronunciation:

epilithic

/ˌɛpɪˈlɪθɪk/