Sistrum is a musical instrument that is commonly used in religious ceremonies in ancient Egypt. It consists of a metal frame with a handle and several metal rods that produce a rattling sound when shaken. Depending on the context or preference, the word sistrum can be substituted with other terms. Synonyms for sistrum include rattle, shaker, maraca, and percussive instrument. In modern times, sistrums are still used in some traditional African music and religious practices. While the use of sistrums has declined in popularity over time, their historical significance and unique sound continue to make them a revered instrument in some cultural and religious traditions.