Noun
The word is derived from tympanum
of Tympanum
Source: Webster's dictionaryIn Khmer temple architecture, the kala serves as a common decorative element on lintels, tympana and walls, where it is depicted as a monstrous head with a large upper jaw lined by large carnivorous teeth, but with no lower jaw. Source: Internet
Until about the 11th century AD, the Angkorian Khmer confined their narrative bas-reliefs to the space on the tympana above doorways. Source: Internet
Most of the missing images were located in the building's two tympana. Source: Internet
The wheels, or tympana, were solid and were several centimetres (inches) thick. Source: Internet