baleen
UK[bəˈliːn]US[bəˈliːn]
n
A horny material that hangs in fringed plates from the upper jaw of some whales, used for filtering plankton from the water.
Etymology
The word 'baleen' entered English in the 14th century from the Latin word 'balaena', meaning 'whale'. Latin borrowed this term from the Greek 'phallaina', which also meant 'whale'. The Greek term is thought to have a deeper, pre-Greek origin, possibly connected to a word for 'monster of the sea'. The semantic journey is direct: the Latin word for the animal itself came to specifically denote the unique, brush-like filtering structure found in its mouth, a classic example of metonymy where the name of the whole comes to represent a distinctive part.
Analysis
The word is a simplex loanword from Latin. It does not contain separable, meaningful morphemes in its modern English spelling.
Examples
The blue whale feeds by taking in huge volumes of water and filtering it through its baleen plates.
Baleen was historically used in products like corsets and umbrella ribs before the advent of plastics.
Scientists can study the growth layers in a piece of baleen to learn about a whale's age and migration patterns.