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tym·pan·ic mem·brane

[TA]
a thin tense membrane forming the greater part of the lateral wall of the tympanic cavity and separating it from the external acoustic meatus; it constitutes the boundary between the external and middle ears; it is a trilaminar membrane covered with skin on its external surface, mucosa in its internal surface, is covered on both surfaces with epithelium, and, in the tense part, has an intermediate layer of outer radial and inner circular collagen fibers.

drum

(drum) tympanic membrane.

drum

(drŭm)
n.
Anatomy The eardrum.

tym·pan·ic mem·brane

(tim-pan'ik mem'brān) [TA]
A thin, tense covering that forms the greater part of the lateral wall of the tympanic cavity and separates it from the external acoustic meatus; it constitutes the boundary between the external and middle ear, is covered on both surfaces with epithelium, and in the tense part has an intermediate layer of outer radial and inner circular collagen fibers.
Synonym(s): membrana tympani [TA] , drum membrane, drum, drumhead, eardrum, myringa, myrinx.
[L. membrana tympani]
References in periodicals archive ?
The drivers were responsible for recording the number of yards of concrete loaded and unloaded, drum revolutions when leaving the plant and arriving at the job site, estimated travel speed and total miles.
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2-12" long 5/16" or 3/8" wood dowels (used for the drum sticks) * colored duct tape--the author used brown, red, and yellow duct tape * 3' to 5' of colored webbing or clothesline rope (for drum strap) * electric blow dryer (optional) * You will also need sandpaper and a small, round file to form the ends of the wood dowels to make the drum sticks.
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Drum removal from the site will begin this morning and is expected to be completed by the end of the week.
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When file glue build-up disrupts the labelling process, the operator must stop the line to clean the drum.