a. [f. L. iaspide-us (f. iaspid-em jasper) + -OUS.] Of the nature of jasper; jaspery.
1804. Watt, in Phil. Trans., XCIV. 283. The formation of secondary spheroids, in the heart of the compact jaspideous substance.
1833. Lyell, Princ. Geol., III. 369. In Arthur’s Seat and Salisbury Craig … a sandstone is seen to come in contact with greenstone, and to be converted into a jaspideous rock.
