adjective Ornithology.
having a beak equipped with thin plates or lamellae for straining water and mud from food, as the ducks, geese, swans, and flamingos.
Also, lamellirostrate [luh-mel-uh-ros-treyt] .

1825–35; < Neo-Latin lāmellirostr(is) + -al1. See lamelli-, rostral Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
lamellirostral or lamellirostrate (ləˌmɛlɪˈrɒstrəl, ləˌmɛlɪˈrɒstreɪt)
(of ducks, geese, etc) having a bill fringed with thin plates on the inner edge for straining water from food
[C19: from New Latin lāmellirostris, from lamella + rostrum beak]
lamellirostrate or lamellirostrate
[C19: from New Latin lāmellirostris, from lamella + rostrum beak]

Collins English Dictionary - Complete & Unabridged 10th Edition
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