The puffin is one example of an alcidine.
any of various northern alcidine shorebirds (esp. genus Fratercula) black above and white below, with a short neck, ducklike body, and a large, brightly colored, triangular beak
Origin of puffinMiddle English poffin ; from uncertain or unknown; perhaps associated, association by folk etymology with puff, because of the enormous beak or blown-up appearance of the young
Any of several seabirds of the genus Fratercula of northern regions, characteristically having black-and-white plumage and a vertically flattened, triangular bill that is brightly colored during breeding season.
Origin of puffinMiddle English poffoun, puffon, perhaps from puf, puff; see puff.
Origin uncertain; perhaps ultimately from Middle Cornish (compare Breton poc'han (“puffin")).