English
lichenous
From lichen + -ous.
A compound of lichen + -ous
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
adj Covered in lichen.
Language periods are conventional ranges, not dates for this word.
Etymograph / lichenous