The term 'drum in Afro-Cuban jazz' refers to two percussion instruments, the CONGA and the BONGO. The CONGA is a tall, narrow drum with a cylindrical body that is played with the hands. It is usually made of wood or fiberglass and is used to provide a rhythmic accompaniment to other instruments. The BONGO is a pair of small drums that are played with the hands and are used to provide a syncopated rhythm. Both instruments are essential components of Afro-Cuban jazz and are used to create a unique sound.