Definition of Tympanum

N
small drum or like (used in worship of Cybele/Bacchus); revolving cylinder

(n.)
The space within an arch, and above a lintel or a subordinate arch, spanning the opening below the arch.
  

(n.)
The recessed face of a pediment within the frame made by the upper and lower cornices, being usually a triangular space or table.
  

(n.)
The ear drum, or middle ear. Sometimes applied incorrectly to the tympanic membrane. See Ear.
  

(n.)
One of the naked, inflatable air sacs on the neck of the prairie chicken and other species of grouse.
  

(n.)
A drum-shaped wheel with spirally curved partitions by which water is raised to the axis when the wheel revolves with the lower part of the circumference submerged, -- used for raising water, as for irrigation.
  

(n.)
A chamber in the anterior part of the syrinx of birds.
  

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tympanum
type \type\ (?), n. [f. type; cf. it. tipo, from l. typus a figure, image, a form, type, character, gr. &?; the mark of a blow, impression, form of character, model, from the root of &?; to beat, strike; cf. skr. tup to hurt.]
1. the mark or impression of something; stamp; impressed sign; emblem. the faith they have in tennis, and tall stockings, short blistered breeches, and those types of travel.
2. form or character impressed; style; semblance. thy father bears the type of king of naples.
3. a figure or representation of something to come; a token; a sign; a symbol; -- correlative to antitype. a type is no longer a type when the thing typified comes to be actually exhibited.
4. that which possesses or exemplifies characteristic qualities; the representative. specifically: (a) (biol.) a general form or structure common to a number of individuals; hence, the ideal representation of a species, genus, or other group, combining the essential characteristics; an animal or plant possessing or exemplifying the essential characteristics of a species, genus, or other group. also, a group or division of animals having a certain typical or characteristic structure of body maintained within the group. since the time of cuvier and baer the whole animal kingdom has been universally held to be divisible into a small number of main divisions or types. aeckel. (b) (fine arts) the original object, or class of objects, scene, face, or conception, which becomes the subject of a copy; esp., the design on the face of a medal or a coin. (c) (chem.) a simple compound, used as a mode or pattern to which other compounds are conveniently regarded as being related, and from which they may be actually or theoretically derived.
note: the fundamental types used to express the simplest and most essential chemical relations are hydrochloric acid, hcl; water, h2o; ammonia, nh3; and methane, ch4.
5. (typog.) (a) a raised letter, figure, accent, or other character, cast in metal or cut in wood, used in printing. (b) such letters or characters, in general, or the whole quantity of them used in printing, spoken of collectively; any number or mass of such letters or characters, however disposed.
note: type are mostly made by casting type metal in a mold, though some of the larger sizes are made from maple, mahogany, or boxwood. in the cut, a is the body; b, the face, or part from which the impression is taken; c, the shoulder, or top of the body; d, the nick (sometimes two or more are made), designed to assist the compositor in distinguishing the bottom of the face from the top; e, the groove made in the process of finishing, -- each type as cast having attached to the bottom of the body a jet, or small piece of metal (formed by the surplus metal poured into the mold), which, when broken off, leaves a roughness that requires to be removed. the fine lines at the top and bottom of a letter are technically called ceriphs, and when part of the face projects over the body, as in the letter f, the projection is called a kern. the type which compose an ordinary book font consist of roman capitals, small capitals, and lower-case letters, and italic capitals and lower-case letters, with accompanying figures, points, and reference marks, -- in all about two hundred characters. including the various modern styles of fancy type, some three or four hundred varieties of face are made. besides the ordinary roman and italic, some of the most important of the varieties are -- old english. black letter. old style. french elzevir. boldface. antique. clarendon. gothic. typewriter. script. the smallest body in common use is diamond; then follow in order of size, pearl, agate, nonpareil, minion, brevier, bourgeois (or two-line diamond), long primer (or two-line pearl), small pica (or two-line agate), pica (or two-line nonpareil), english (or two-line min

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Noun
1. the main cavity of the ear; between the eardrum and the inner ear
(synonym) middle ear, tympanic cavity
(hypernym) cavity, bodily cavity, cavum
(part-holonym) auditory apparatus
(part-meronym) ossicle, bonelet, ossiculum
2. the membrane in the ear that vibrates to sound
(synonym) eardrum, tympanic membrane, myringa
(hypernym) membrane, tissue layer
(hyponym) perforated eardrum
(part-holonym) ear
(part-meronym) umbo
3. a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it
(synonym) kettle, kettledrum, tympani, timpani
(hypernym) percussion instrument, percussive instrument

A vibrating membrane (for sound production) or a membrane for use as an auditory organ (eardrum).

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The anatomic name for the cavity of the middle ear which is separated from the outer ear by the ear drum.