Definition of "fuliginosity" [fu•lig•i•nos•i•ty]

• The condition or quality of being fuliginous; sootiness. (noun)
• Matter deposited by smoke. (noun)

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• ""Secondly, that the blackness of this ink does proceed from the fuliginosity or sooty part of the coal of the cork which is exceeding porous and light, and that this fuliginosity is nothing but an oil very much rarefied."