l a m e l l æ  (luh-meh-lee or luh-meh-lai)
noun plural : thin flat scales, membranes, or layers : such as composing :

the gills of a fish
the gills of a mushroom
the gills of a bivalve mollusk (bivalvia)
the gill-like shapes in chloroplast
even... the gill-like shapes in medieval armour

in short : the gills through which objects, bones, plants, fungi, animals, bodies breathe. miam !