English
lichenist
From lichen + -ist.
Formed from lichen + -ist
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 One who studies lichens.
Language periods are conventional ranges, not dates for this word.
Etymograph / lichenist