nCrotalum(Mus) A kind of castanet used by the Corybantes.
Century Dictionary and Cyclopedia
ncrotalumA rattle or clapper, made of wood or bone, anciently used in Egypt and Greece.
ncrotalumA name given to bells of the form of sleigh-bells or grelots. Such bells, when very small, were used for hawks, and, as hawk-bells, often appear in heraldry. Larger ones are occasionally seen, which have been handed down from the middle ages, and are still utilized in certain curious local customs.