Definitions of dipper:

• noun:   a ladle that has a cup with a long handle
• noun:   small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom
• noun:   a group of seven bright stars in the constellation Ursa Major
• noun:   a cluster of seven stars in Ursa Minor; at the end of the dipper's handle is Polaris
• noun:   small North American diving duck; males have bushy head plumage