[af.fine] n [MF affin, fr. L affinis, fr. affinis related] (ca. 1509): a relative by marriage
[2]affine adj [L affinis, adj.] (1918): of, relating to, or being a transformation (as a translation, a rotation, or a uniform stretching) that carries straight lines into straight lines and parallel lines into parallel lines but may alter distance between points and angles between lines "~ geometry" -- af.fine.ly adv