Source : Webster's Revised Unabridged Dictionary (1913)

Tenuity \Te*nu"i*ty\, n. [L. tenuitas, from tenuis thin: cf. F.
   t['e]nuit['e]. See {Tenuous}.]
   1. The quality or state of being tenuous; thinness, applied
      to a broad substance; slenderness, applied to anything
      that is long; as, the tenuity of a leaf; the tenuity of a
      hair.

   2. Rarily; rareness; thinness, as of a fluid; as, the tenuity
      of the air; the tenuity of the blood. --Bacon.

   3. Poverty; indigence. [Obs.] --Eikon Basilike.

   4. Refinement; delicacy.

Source : WordNet®

tenuity
     n 1: relatively small dimension through an object as opposed to
          its length or width; "the tenuity of a hair"; "the
          thinness of a rope" [syn: {thinness}, {slenderness}]
          [ant: {thickness}]
     2: the quality of lacking intensity or substance; "a shrill yet
        sweet tenuity of voice"- Nathaniel Hawthorne [syn: {feebleness}]
     3: a rarified quality; "the tenuity of the upper atmosphere"
        [syn: {rarity}, {low density}]