cephaloptera

from The Century Dictionary.

• noun The typical genus of the family Cephalopteridæ: so called from having a pair of projections like horns upon the head. Also Cephalopterus.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) One of the generic names of the gigantic ray (Manta birostris) of the family Mobulidae, known as devilfish, sea devil, manta and manta ray. It is common on the coasts of South Carolina, Florida, and farther south, and is sometimes found as far north as New York Bay. Some of them grow to enormous size, becoming twenty feet of more across the body, and weighing more than a ton.