membranelle
/ˌmɛmbrəˈnɛl/Biology
noun
In some ciliates and rotifers: a flattened triangular or fan-shaped organ formed from two or three short rows of cilia which behave as though fused together, used for locomotion or feeding. Usually in plural.
Origin
Early 20th century; earliest use found in Gary Calkins (1869–1943). Alteration of membranella, after organelle.