TENU'ITY, noun [Latin tenuitas, from tenuis, thin. See Thin.] 1. Thinness, smallness in diameter; exility; thinness, applied to a broad substance, and slenderness, applied to one that is long; as the tenuity of paper or of a leaf; the tenuity of a hair or filament. 2. Rarity; rareness; thinness; as of a fluid; as the tenuity of the air in the higher regions of the atmosphere; the tenuity of the blood. 3. Poverty. [Not in use.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI