Tenúitas, pen. corr. tenuitâtis, f. g. Plin. Smalnesse: pouertie: leanenesse: slendernesse.Cauda prælonga in tenuitatem desinens. Plin. A long taile with a sinall ende: sharpe towarde the end.Tenuitas fugit aciem.Cic.It is so small it cannot be seene.
Lewis and Short: Latin dictionary
tĕnŭĭtas, ātis. f. [tenuis], thinness, slenderness, fineness, smallness, tenuity (class.). I.Lit.: casurusne in conspectum videatur animus, an tanta sit ejus tenuitas, ut fugiat aciem, Cic. Tusc. 1, 22, 50: valetudo modo bona sit, tenuitas ipsa delectat,