Webster's English Dictionarylamella
la.mel.la \l*-'mel-*\ \-'mel-(.)e-, -.i-\ \-'mel-*r\ n or la.mel.lae also lamellas [NL, fr. L, dim. of lamina thin plate] pl : a thin flat scale or part : as : one of the thin plates composing the gills of a bivalve mollusk : a gill of a mushroom - la.mel.lar aj