@richam Alicorn is the Latin word for the horn of a unicorn, according to Wikipedia.
My Little Pony popularized calling winged unicorns “alicorns” to differentiate them from non-winged unicorns and winged non-unicorns (pegasus).
@concernedcatholic Is your daughter my daughter? At this point I’m convinced My Little Pony exists so our kids can explain to us we don’t know shit about unicorns or alicorns or anything.