<p><strong>Noun:</strong></p><ul><li>A membrane in the ear canal between the external ear and the middle ear; tympanic membrane.</li><li>Middle ear.</li><li>A recessed, usually triangular space enclosed between the horizontal and sloping cornices of a pediment, often decorated with sculpture.</li><li>A similar space between an arch and the horizontal head of a door or window below.</li><li>The diaphragm of a telephone.</li><li>A drum or similar instrument.</li><li>The stretched membrane forming a drumhead.</li></ul>