2. Something resembling such an instrument in shape or sound, as:
a. The round, flared opening of a wind instrument at the opposite end from the mouthpiece.
b. bells A percussion instrument consisting of metal tubes or bars that emit tones when struck.
c. A hollow, usually inverted vessel, such as one used for diving deep below the surface of a body of water.
d. The corolla of a flower: "In a cowslip's bell I lie" (Shakespeare).
e. The body of a jellyfish.
3. Nautical a. A stroke on a hollow metal instrument to mark the hour.
b. The time indicated by the striking of this instrument, divided into half hours.