Definition of inspissate in US English:

inspissate

verb

[with object]usually as adjective inspissated
  • Thicken or congeal.

    ‘inspissated secretions’
    • ‘Yet the activity on the new issue markets simply does not support the prevailing, inspissated gloom.’
    • ‘In these studies, ‘mucous balls,’ an accumulation of inspissated mucus that adheres to the catheter tip, caused infrequent, but serious, complications.’
    • ‘Secretions become viscous and inspissated (ie, glutinous and thickened by evaporation or absorption), and calcium carbonate precipitates, which results in ductal stone formation.’
    • ‘Coming back to Japan and the inspissated gloom hereabouts - as found among artists, novelists, intellectuals and the press - my view is that it is always going to be there, and is a great thing for Japan.’
    • ‘At autopsy, the airways are often devoid of inspissated secretions and contain more neutrophils and eosinophils in the submucosa.’
    • ‘However, determined tunnelling into the inspissated mass of detail reveals some fascinating things.’
    solidify, set, become hard, become solid, congeal, clot, coagulate, stiffen, thicken, cake, freeze, bake, crystallize
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Origin

Early 17th century: from late Latin inspissat- ‘made thick’, from the verb inspissare (based on Latin spissus ‘thick, dense’).

Pronunciation