n. [ L. tenuitas, from tenuis thin: cf. F. ténuité. 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. [ 1913 Webster ]
2. Rarily; rareness; thinness, as of a fluid; as, the tenuity of the air; the tenuity of the blood. Bacon. [ 1913 Webster ]