geocronite

[Ger. geocronit, pref. geo-, and Gr. Kronos = Saturn, used by the alchemists for lead.] mineral, of metallic luster; its hardne , 2 to 3; its Min .: An orthorhombic lead-gray, or grayish-blue specific gravity, 6·4 to 6'6, its composition: Sulphur, 165; antimony, 167; lead, 668 = 100. Found in Sweden, Spain, and Tuscany. ( Dana .) gě-o-çy-clic, a . [Pref. geo- , and Eng. cyclic . ] 1. Of or belonging to the revolutions of the earth. 2. Periodically encircling the earth.