Definition of "versor" [ver•sor]

• A quaternion of norm one. (noun)

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• "When, therefore, Luther wrote on January 15: "Modo in parando catechismo pro rudibus paganis versor," he was engaged on both"
• "-- _Unus tu et solus cardinem rerum vidisti, et ipsum iugulum petisti, pro quo ex animo tibi gratias ago, in hac enim causa libentius versor, quantum favet tempus et otium."
• "January 15, 1529, Luther wrote to Martin Goerlitz: "_Modo in parando catechismo pro rudibus paganis versor."