Word: disc
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Dates: during 1890-1899
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...base of the cone and holds the sides of the cone firmly to the glass bottom. Through a point a little to the side of the centre of the glass base, passes the cathode pole into the lamp, and at the end of this is fastened a platinum disc, at such an angle as to be parallel with the side of the lamp. At the top of the lamp and directly connected to the metallic side, is the anode pole, and at the top of the cone is a glass tube with a cock-stop, so that...
...from the sixth century. There is an other case filled with Babylonian and Assyrian seals, cylindrical and conical in shape, used as charms against evil spirits and also for stamping written documents. They are carved with emblems of the gods, men, animals, etc. A unique object is a lapislazuli disc about an inch and a half in diameter, once the property of a temple. It was presented to a certain god for the life of the donor,-perhaps for his rescue from some danger...