lamellirostres

from The Century Dictionary.

• In Cuvier's classification, the fourth family of his sixth order of birds (Palmipedes), containing those which have the bill lamellosodentate and covered with a soft skin, with a nail at the end, as ducks, geese, swans, and flamingos.

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

• noun plural (Zoöl.) A group of birds embracing the Anseres and flamingoes, in which the bill is lamellate.