Pelican shape is the meaning of 'Pelecaniformes'. The Greek 'pelekan' and the Latin 'forma' make up the roots of 'Pelecaniformes'. The Greek noun finds a Latin derivative in 'pelicanus, pelecanus'. Both the original Greek and the derived Latin refer to the bird that's called 'pelican' in English. The Latin word is a feminine gender noun that means 'shape'. So the term refers to a shape that includes or gives the impression of large web feet, a long bill, and a pouch in the upper throat.