"bivalve mollusk," 1401, from O.Fr. escalope
"shell," variant of eschalope,
probably from a Gmc. source (cf. O.N. skalpr
"sheath," M.Du. schelpe
"shell"); see scale
(n.1). Extended 17c. to objects shaped like scallop shells, especially in design and dress. The verb in the cookery sense, "to bake in a scallop shell-shaped pan," is attested from 1737.