Source : Webster's Revised Unabridged Dictionary (1913)

Crassitude \Cras"si*tude\ (-t?d), n. [L. crassitudo.]
   Grossness; coarseness; thickness; density. --Bacon.

Source : WordNet®

crassitude
     n : the quality of being crass--devoid of refinement [syn: {crassness}]