Piciformes

from The Century Dictionary.

• noun In Garrod's classification, a superfamily of anomalogonatous picarian birds, having a tufted oil-gland, one carotid, and no cæca, including the Picidæ and some related families: contrasted with Cypseliformes.
• noun In Coues's system (1884), the woodpeckers alone as a suborder of Picariæ, composed of the three families Picidæ, Picumnidæ, and Iyngidæ.

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

• proper noun plural (Zoöl.) A group of birds including the woodpeckers, toucans, barbets, colies, kingfishes, hornbills, and some other related groups.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• proper noun A taxonomic order within the subclass Neognathae — the woodpeckers, barbets, toucans, jacamars, puffbirds and honeyguides etc.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun woodpeckers; jacamars; puffbirds; barbets; honey guides; toucans