two changes at once
licopodum, with the y and the i both gone
lycopodium.
two changes at once
The two letters missing here are the two that carry the meaning. The y makes lykos, a wolf. The i makes podium, a foot. Together they are the reason a low creeping plant on a Yorkshire moor is named after an animal's paw, and if you write the word without them it stops describing anything. The English name is doing the same job by other means: a clubmoss, for the club-shaped cones the wolf's foot holds up.
The class
Two separate decisions about the letters, both made at once.
Same name
Other spellings recorded for lycopodium
The name