noun. The thin, semitransparent, oval-shaped membrane that separates the middle ear from the external ear.

noun. The middle ear; the tympanum. See tympanum, and first cut under ear.

noun. More especially, the tympanic membrane: as, to burst or puncture the ear-drum. See cuts under ear and tympanic.

noun. The tympanum. See Illust. of ear.

noun. A thin membrane that separates the outer ear from the middle ear and transmits sound from the air to the malleus.

noun. the membrane in the ear that vibrates to sound

"NEW YORK — Christiane Amanpour stood on ABC's "This Week" on Sunday in a khaki shirt with a backdrop of Cairo in crisis, rattling off reports from the street in Egypt and noting the presence of flyovers by fighter jets in what she described as eardrum-ripping sound."

membrane  tissue layer  

perforated eardrum  

bronchi  cholecystectomy  contol  cornea  corneal  

Eustachian tube  allantoic membrane  amnion  amniotic sac  anvil  

ear