block - a solid piece of something (usually having flat rectangular sides); "the pyramids were built with large stone blocks"

smithy, forge - a workplace where metal is worked by heating and hammering

auditory ossicle - ossicles of the middle ear that transmit acoustic vibrations from the eardrum to the inner ear

middle ear, tympanic cavity, tympanum - the main cavity of the ear; between the eardrum and the inner ear