S / spissĭtūdo
noun

spissĭtūdo

gen. spissĭtūdĭnis · gender feminine · decl. 3rd
thickness; density; consistency
thickness, density, consistency (post-Aug. and very rare): aëris crassi, Sen. Q. N. 2, 30, 4: mellis, Scrib. Comp. 4; 5: emplastri, id. ib. 81: non nimis liquida, id. ib. 37: spissitudinem ejus absolvere, Pall. 12, 17, 2.