Ten"sor (?), n. [NL. See Tension.] 1. (Anat.) A muscle that stretches a part, or renders it tense.

2. (Geom.) The ratio of one vector to another in length, no regard being had to the direction of the two vectors; -- so called because considered as a stretching factor in changing one vector into another. See Versor.

Ten"sor (?), n. [NL. See Tension.] 1. (Anat.) A muscle that stretches a part, or renders it tense.

2. (Geom.) The ratio of one vector to another in length, no regard being had to the direction of the two vectors; -- so called because considered as a stretching factor in changing one vector into another. See Versor.

• A muscle that stretches a part, or renders it tense.
  
• A mathematical object that obeys certain transformation rules.