tympanum

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Related to tympana: Tympanon

tympanum

(tĭm`pənəm). In architecture, the triangular space of a pedimentpediment,
in architecture, the triangular gable end on a building of classic type or a similar form used decoratively. It consists of the tympanum, or triangular wall surface, enclosed below by the horizontal cornice and above by the raking cornice, which follows the slope of
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, or low-pitched gable, above a portico, door, or window. Its boundaries are generally cornice moldings. The term also designates the solid wall space above an arched window or door. Sculptured tympana of this type, within round or pointed arches, occurred above the doors of the recessed portals in the medieval churches. They were universal in both Romanesque and Gothic periods, and were especially fine in France. The usual subjects are biblical and symbolic, often arranged in horizontal tiers with numerous figures to illustrate a complete legend. Over the central doorway of Notre-Dame de Paris is a depiction of the Last Judgment. In Italy tympana were sometimes decorated with mosaic or fresco.

Tympanum

The triangular space between the horizontal and sloping cornices immediately above the opening of a doorway or a window, or the space between the lintel above a door and the arch above.

tympanum

[′tim·pə·nəm]
(anatomy)
(invertebrate zoology)
A thin membrane covering an organ of hearing in insects.

tympanum

tympanum, 1
1. The triangular or segmental space enclosed between the horizontal cornice of a pediment and the underside of the raking or curved cornice above; sometimes decorated with decorative elements, sculpture, or a window.
2. Any space similarly marked off or bounded, as between the lintel of a door and the arch above.

tympanum

1. 
a. the cavity of the middle ear
b. another name for tympanic membrane
2. any diaphragm resembling that in the middle ear in function
3. Architect
a. the recessed space bounded by the cornices of a pediment, esp one that is triangular in shape and ornamented
b. the recessed space bounded by an arch and the lintel of a doorway or window below it
4. Music a tympan or drum
5. a scoop wheel for raising water
References in periodicals archive ?
The genus Phrynops is a member of the toadhead complex of chelid turtles, with the following characteristics: The head is flat and wide, with a blunt snout, and has a width between the tympana 1520% of the median straight length of the carapace.
The carapace is relatively broad, as is the head, whose width between the tympana is 20% or more of the median straight length of the carapace.
Most puzzling were the unconcealed tympana of these species, combined with tiny auditory spiracles and other characteristics, each typical of a different subfamily.
Tiny brachypterous tettigoniids with, in lateral view, narrow head, spiny fore and middle tibiae, open tympana, and small auditory spiracle.
Members of Ecuanedubini have concealed tympana with slit-shaped ear openings, a more elongated and, in males, usually strongly modified pronotum, and a pair of thin spines on all three sternites.
Tympana unconcealed, only ventral margin slightly conchate.
Tympana exposed; forecoxal spine minute, weakly nodiform; inner genicular lobe of forefemur lacking ventro-apical spine, outer genicular lobe with one spine (sometimes absent); midfemur with inner genicular lobe with one minute ventro-apical spine, outer lobe unarmed (sometimes with one ventro-apical spine); both genicular lobes ofhind femur unarmed.
For example, Bateman & Fleming (2006) showed that, while mating history had no influence on autotomy time in male Gryllus bimaculatus, unmated females (that need tympana on the front legs to locate calling males) are less 'willing' to shed these legs when entrapped compared with mated females.
Forelegs: femur with 2 spines on inner ventral margin only; ventral margins of tibia each with 5 well-developed spines; tympana with bulbous well-developed shields.
Forelegs: femur with 3 to 4 spines on inner ventral margin only; ventral margins of tibia each with 8 well-developed spines; tympana with bulbous well-developed shields.