D defs.my
Entry 2 senses Webster, 1913

Tensor

/tĕn'-sẽr/ · Ten·sor · IPA /ˈtɛn.sɚ/
01 n. A muscle that stretches a part, or renders it tense.
  1. 1.
    A muscle that stretches a part, or renders it tense.(Anat.)
  2. 2.
    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.(Geom.) See: Versor