geode, an irregular shaped stone, containing a small cavity.
The geode is a spherical and apparently solid stone, but when broken is found to be hollow and coated with crystals.
The geode has a hollow cell within, lined with beautiful crystals of many colors.
No date; no place mentioned; we note the suggestion that it was only a geode, which had been upon the ground in the first place.
A geode is a hollow shell of stone, usually quartz, lined with crystals pointing toward the center.
rounded stone with a hollow center lined with crystals, 1670s, from French géode, from Latin geodes, from Greek geodes "earthy, earth-like," from ge "earth" (Homeric gaia; see Gaia) + -oides, adjective suffix, "characterized by." Perhaps so called in reference to the "earthy" minerals inside.
geode ge·ode (jē'ōd')
A cystlike space with or without an epithelial lining, usually observed in subarticular bone in arthritic disorders.