inspissation

from WordNet (r) 3.0 (2006)

inspissation
    n 1: the process of thickening by dehydration
    2: the act of thickening [syn: {thickening}, {inspissation}]

from The Collaborative International Dictionary of English v.0.48

Inspissation \In`spis*sa"tion\, n.
   The act or the process of inspissating, or thickening a fluid
   substance, as by evaporation; also, the state of being so
   thickened.
   [1913 Webster]