Q / quā^drus
adjective

quā^drus

fem. quā^dra · neut. quā^drum
for quatrus, from quattuor
square
square (post-class.): quadrus terminus, Auct. Limit. p. 281 Goes.: cella, Pall. 1, 40: lapides, Vulg. Isa. 9, 10.