mother-of-pearl

n [U] (also nacre) hard smooth shiny rainbow-coloured substance that forms the lining of some shells (eg oysters, mussels) and is used for making buttons, ornaments, etc 珠母层; 珍珠母: [attrib 作定语] a mother-of-pearl ear-ring, necklace, brooch, etc 珠母耳环、 项链、 饰针等.

mossback, mossy, most, mostly, MOT, mote, motel, motet, moth, moth-eaten, mothball, mother, mother country, Mother Nature, mother ship, Mother Superior, mother tongue, mother's boy, Mother's Day, mother-in-law, mother-to-be, motherhood, motherland, motherless, motherlike, motherliness, motherly, mothproof, motif, motile, motility, motion, motion picture, motionless, motivate, motivated, motivation, motivational, motive, motiveless,