English
lichenification
From lichen + -ification.
Formed from lichen + -ification
Proto-Indo-European *leyǵʰ- ‘to lick’
…
Proto-Hellenic *léikʰō
Ancient Greek λείχω ‘to lick’
Ancient Greek λειχήν ‘Lichen-like disease affecting the skin of…’
Latin līchēn ‘a cryptogamic species of vegetation growing…’
English lichen
Today it means
noun Epidermal thickening characterized by visible and palpable thickening of the skin with accentuated skin markings.
Language periods are conventional ranges, not dates for this word.
Etymograph / lichenification