also: てんそう
noun
A window set into a roof or ceiling to admit daylight.
リビングの天窓から柔らかい光が差し込む。
Soft light streams in through the skylight in the living room.
noun
Only with reading てんそう
Rare architectural term for the upper horizontal part of a door or window frame; read てんそう.
この建具の天窓には装飾が施されている。
The head of this fitting is decorated.
Compound of 天 (ten, 'heaven, sky') and 窓 (mado, 'window'). The reading てんそう uses the on'yomi of 窓 (sō).