D defs.my
Entry 1 sense Webster, 1913

Baleen

/(bȧ*lēn")/ · Ba·leen · IPA /bəˈliːn/
01 n. Plates or blades of “whalebone,” from two to twelve feet long, and sometimes a foot wide, which in certain whales (Balænoidea) are attached…
  1. 1.
    Plates or blades of “whalebone,” from two to twelve feet long, and sometimes a foot wide, which in certain whales (Balænoidea) are attached side by side along the upper jaw, and form a fringelike sieve by which the food is retained in the mouth.(Zool. & Com.)