tym·pa·num also tim·pa·num 
(tĭmpə-nəm)
(tĭmpə-nəm)n. pl. tym·pa·na (-nə) or tym·pa·nums also tim·pa·na or tim·pa·nums
1.
a. Anatomy See middle ear.
b. See eardrum.
2. Zoology A membranous external auditory structure, as in certain insects.
3. Architecture
a. The ornamental recessed space or panel enclosed by the cornices of a triangular pediment.
b. A similar space between an arch and the lintel of a portal or window.
4. The diaphragm of a telephone.
[Medieval Latin, from Latin, drum, from Greek tumpanon.]
tympanumover the main door of the Cathedral of Notre-Dame
Chartres, France
- insurgent
- insurgently
- insurmountability
- insurmountable
- insurmountableness
- insurmountably
- insurrection
- insurrectional
- insurrectionary
- insurrectionism
- insurrectionist
- insusceptibility
- insusceptible
- insusceptibly
- INT
- int.
- intact
- intact dilation and extraction
- intactly
- intactness
- intaglio
- intake
- intangibility
- intangible
- intangibleness