Definition of "acervation" [ac•er•va•tion]

• A heaping up; accumulation - Johnson (noun)

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• "Cold and phlegmatic in their own nature, like damp hay, they heat and inflame by co-acervation; or like bees they become restless and irritable through the increased temperature of collected multitudes."
• "'Fanatici-qui circum fana favorem mutuo contrahunt el afflant' -- those who in the same conventicle, or before the same shrine, relique or image, heat and ferment by co-acervation."