noun: a soft gray substance used for putting glass in windows

Keely
The vibrations induced by this experiments reached over 700,000,000 per second, unshipping the apparatus, thus making it insecure for a repetition of the experiments. The decarbonized steel compressors of said apparatus moved as if composed of putty.

Volume of sphere 15 cubic in weight of surrounding metal, 316 lbs. [Snell Manuscript - The Book, page 3]