Noun
A small opening; esp., one of the apertures, closed by membranes, between the tympanum and internal ear.
Source: Webster's dictionaryThis is connected indirectly with the eardrum via a mostly cartilaginous extracolumella and medially to the inner-ear spaces via a widened footplate in the fenestra ovalis. Source: Internet
For example, the Portuguese word fresta is descended from Latin fenestra "window" (and is thus cognate to French fenêtre, Italian finestra, Romanian fereastră and so on), but now means "skylight" and "slit". Source: Internet
It is however doubtful that all anapsids lack temporal fenestra as a primitive trait, and that all the groups traditionally seen as anapsids truly lacked fenestra. Source: Internet
Lizards have skulls with only one fenestra on each side, the lower bar of bone below the second fenestra having been lost. Source: Internet
Many Germanic languages however adopted the Latin word 'fenestra' to describe a window with glass, such as standard Swedish 'fönster', or German 'Fenster'. Source: Internet