system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are unicorns not called unihorns?

If uni means one then the next part of the word should be horn because thats what it is referring to, right?
gpt
In short, they are.

> unicorn (n.)
> early 13c., from Old French unicorne, from Late Latin unicornus (Vulgate), from noun use of Latin unicornis (adj.) "having one horn," from uni- "one" (see uni-) + cornus "horn" (see horn). 
> 

The "corn" in "unicorn" is actually from a Latin root that meant "horn". Consequently, this means they are in fact named "unihorns".