(comparative more spiss, superlative most spiss)
(obsolete) thick; compact; dense; crowdedhttps://en.wiktionary.org/wiki/spiss
It is true, that to supply in some sort this defect, they have a little Chrystalline in the middle of the great one, and this little Chrystalline being of a more spiss
consistence then the great one, its refraction is also more strong, and makes the rayes, which come from the point in the Axis an pass near the Center of the Chrystalline to refract more than if there had been but one Chrystalline.
The Answer Of Monsieur de Mariotte to Monsieur Pecquet, about the Opinion, that de Choroeides is the principal Organ of Sight; communicated to the Publisher from Paris, and Englished as follows.
Philosophical Transactions, 1670https://books.google.com.ar/books?hl=es&id=nx...