The Collaborative International Dictionary of English v.0.48:
Pelecaniformes \Pel`e*can`i*for"mes\, n. pl. [NL. See Pelican, and -form.] (Zool.) Those birds that are related to the pelican; the Totipalmi. [1913 Webster]WordNet (r) 3.0 (2006):
Pelecaniformes n 1: pelicans; frigate birds; gannets; cormorants [syn: Pelecaniformes, order Pelecaniformes]