nMarver(Glass Marking) A stone, or cast-iron plate, or former, on which hot glass is rolled to give it shape.
Century Dictionary and Cyclopedia
nmarverIn glass manufacturing, a slab or tablet, originally of marble, but now generally of polished cast-iron, placed on a suitable support or stand, and used by the glass-blower to impart, by rolling and pressing, a cylindrical form to the fused glass gathered upon the end of the blowpipe. It sometimes has concavities formed in it, by which a spheroidal shape may be given to the fused mass when desired. Also maver.
marverIn glass manufacturing, to shape by means of a marver. Also maver.
Webster's Revised Unabridged Dictionary
Prob. corrupt. fr. OE. or F. marbre, marble
With incredible speed the blower flattened its base upon a marver or table topped with sheet iron.