What are quadratus?

Some articles on quadratus:

Quadratus (martyr) - Quadratus, Theodosius, Emmanuel and Companions
... This Quadratus or Codratus was a martyred bishop in Anatolia ... He was arrested and put to death with forty-two other martyrs, including Emmanuel and Theodosius, during the persecution of the Christians by Diocletian in 304 ...
Marcia (mistress Of Commodus) - Commodus' Favorite Mistress
... of one of his cousins, Senator Marcus Ummidius Quadratus Annianus, and subsequently a wife of his servant Eclectus ... However, in AD 182, Lucilla, the sister of Commodus, convinced Marcia to join in a plot with Quadratus to kill Commodus ... plot was discovered and both Lucilla and Quadratus were executed ...
Gaius Julius Severus (proconsul)
... He was the son of (Gaius) Julius Quadratus, a Roman Cavalry Officer ... as well as cousin of (Gaius) Iulius (Asinius) Quadratus (father of Gaius Asinius Quadratus) ...
Gaius Asinius Quadratus Protimus
... Gaius Asinius Quadratus Protimus or Gaius Protimus Quadratus Asinius (ca. 165 - aft ...
Quadratus - Anatomy
... In anatomy, quadratus refers to a quadrilateral (square or rectangular) shape ... Structures with quadratus in their name are Lobus quadratus, the quadrate lobe of liver Pronator quadratus muscle, in the forearm Quadratus femoris muscle, in the posterior hip Quadratus ...