drum


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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 classic literature ?
As the moon declined slowly toward the lofty, foliaged horizon of the amphitheater the booming of the drum decreased and lessened were the exertions of the dancers, until, at last, the final note was struck and the huge beasts turned to fall upon the feast they had dragged hither for the orgy.
At the old man's word and outstretched arm, the roll of the drum was hushed at once, and the advancing line stood still.
As the din of the drum rose to almost deafening volume Kerchak sprang into the open space between the squatting males and the drummers.
The din of the drum was now increased, as well as the frequency of the blows, and the warriors, as each approached the victim of the hunt and delivered his bludgeon blow, joined in the mad whirl of the Death Dance.
In the center of the amphitheater was one of those strange earthen drums which the anthropoids build for the queer rites the sounds of which men have heard in the fastnesses of the jungle, but which none has ever witnessed.
Behind Monet and Debussy the umbrella persisted, with the steady beat of a drum.
In night-fighting, then, make much use of signal-fires and drums, and in fighting by day, of flags and banners, as a means of influencing the ears and eyes of your army.
All that day the drums resounded, the priests chanted, and the multitude feasted and roared till sunset, when the throng dispersed, and the Taboo Groves were again abandoned to quiet and repose.
All day the drums rumbled and whispered, while their menace reflected itself in the faces of our colored companions.
That's a graveyard, and it's proper to muffle the drums and lower the flags as we go by, and we'd better take off our hats, too; it's more respectable, I think.
whispered Rose, as the little troop marched slowly by to the muffled roll of the drums, every flag and sword held low, all the little heads uncovered, and the childish faces very sober as the leafy shadows flickered over them.
But before Alice could answer him, the drums began.