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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 ?
Walker Magnetics manufactures a complete fine of magnetic pulley, both permanent and electro magnetic manually cleaned or self-cleaning suspended magnets, both permanent and electro magnetic drums and nonferrous eddy current separators.
Utilizing two custom, high performance magnetic drums to pull shot from the sand, which flows underneath the drums, we can eliminate sand wearing on the drums.
The magnetic drums used in the ferrous recovery portion of a shredder's downstream system are to be considered next.
Magnetic separators, whether magnetic pulleys, suspended magnets or magnetic drums that are placed appropriately in a system can remove or sort these ferrous materials from those that are non-magnetic.
The magnetic separation equipment industry can provide magnetic head pulleys, suspended separators, magnetic drums and an eddy current system for non-ferrous metallic removal.
Magnetic drums have permanent magnets for continuos, low-cost separation and can be installed inside closed chutes, at outlets of chutes and hoppers, or where materials discharge from feeders and conveyors.
Also magnetic drums with crisscross or agitator-type magnetic fields; magnetic bumps for removing tramp iron from freeflowing, gravity-fed materials; rare-earth eddy-current separators for removing nonferrous metallics from bulk nonmetallic products; and models HI-VI and Hi-Speed vibratory feeders.