Dictionary.com
Thesaurus.com

lowside window

American  
[loh-sahyd] / ˈloʊˌsaɪd /
Or low side window

noun

  1. (in medieval English churches) a window set low in the outside wall, permitting the interior to be seen from the outside.


Etymology

Origin of lowside window

First recorded in 1840–50; low 1 + side 1