Definition of "quadratum" []

• In zoology, the quadrate bone: more fully called os quadratum. (noun)
• In medieval music, a breve. (noun)

The Century Dictionary (Public Domain)

• "Agmen quadratum was a formation that saw an army of sufficient strength spread in columns across a wide front, ready in an instant to wheel and take up battle stations."
• "The Romans, she noted, based many buildings "on the geometry of the square and its diagonal, the ad quadratum.""
• "The street is bordered on either side by walls made of opus quadratum (regular rectangular courses), made of ashlars with drafted edges (see Colonnaded Street, July 10-13, 2006)."