redhead

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A person with red hair.
2. n. A North American duck (Aythya americana), the male of which has black and gray plumage and a reddish head.

Century Dictionary and Cyclopedia

1. n. A person having red hair.
2. n. A red-headed duck, the pochard, Fuligula or Æthyia ferina, a common bird of Europe, a variety of which bears the same name in America and is called more fully red-headed duck, red-headed raftduck, red-headed broadbill, also grayback, Washington canvasback, and American pochard. In the male the head is of a bright chestnut-red with coppery or bronzy reflection. It is a near relative of the canvasback, for which it is sometimes sold, and is much esteemed for the table. See pochard.
3. n. The red-headed woodpecker, Melanerpes erythrocephalus. See cut under Melanerpes.
4. n. A tropical milkweed, Asclepias Curassavica, with umbels of bright-red flowers. The root and the expressed juice are emetic, or in smaller doses cathartic. Also called blood-flower and bastard ipecacuanha.

Wiktionary

1. n. A person with red hair.
2. n. A North American duck Aythya americana, highly esteemed as a game bird.
3. n. A kind of milkweed Asclepias curassavica with red flowers, formerly used in medicine.
4. n. Chinese red-headed centipede
5. n. red-headed bunting
6. n. red-headed titi
7. n. red-headed vulture
8. n. red-headed woodpecker Melanerpes erythrocephalus

GNU Webster's 1913

1. n. A person having red hair.
2. n. An American duck (Aythya Americana) highly esteemed as a game bird. It is closely allied to the canvasback, but is smaller and its head brighter red. Called also red-headed duck. American poachard, grayback, and fall duck. See Illust. under Poachard.
3. n. The red-headed woodpecker. See Woodpecker.
4. n. (Bot.) A kind of milkweed (Asclepias Curassavica) with red flowers. It is used in medicine.

WordNet 3.0

1. n. someone who has red hair
2. n. North American diving duck with a grey-and-black body and reddish-brown head
3. n. black-and-white North American woodpecker having a red head and neck