A lump of calcined glass materials, brought to a pasty condition in a reverberatory furnace, preliminary to the perfect vitrification in the melting pot.

superlative form of unsteady: most unsteady

A bog or marsh; marshy ground, swampland. / A marsh or fen on which low trees or bushes grow; a marshy woodland.

(organic chemistry, especially in combination) Any alkoxy derivative of a sulfonium ion