Wouldn't they be alchemist, since they were created from it? But not an alchemist? Could be wrong...
...i think the only homunculous that could be considerd an alchemist is wrath (anime wrath, not manga wrath)
created from alchemy doesnt make them alchemists..... although they have powers.... so whatever
wait...scar would be considerd an alchemist right? Dammit...