[sp332]

A pegasus doesn't have a horn. A flying unicorn is usually called an "alicorn" but also pegacorn, unisus, or unipeg. /pedantic

[debacle]

To be far more pedantic, Pegasus is the name of a single flying horse, it's not the name for horses with wings.

[saalweachter]

And heaping on, Pegasus was not part of a breed or species. He was a one-off, the offspring of Poseidon and Medusa. He had a brother, Chrysaor, a man.

[AdieuToLogic]

Obligatory Futurama reference:

  You are technically correct, the best kind
  of correct

:-)

[bhauer]

Maybe jgrahamc already edited his comment, but I don't see that he ever said a pegasus had a horn.

On a separate matter, I would prefer to not use either term, but people love these convenient categories.

[sp332]

I was inferring from "unicorn... that might actually take off."

[jgrahamc]

I didn't edit it.