from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A concretionary nodule of clay ironstone.
from the GNU version of the Collaborative International Dictionary of English
- n. A concretionary nodule of clay ironstone, of the size of a walnut or larger, so called by the ancients, who believed that the eagle transported these stones to her nest to facilitate the laying of her eggs; aëtites.
from The Century Dictionary and Cyclopedia
- n. A variety of argillaceous oxid of iron, found in masses varying from the size of a walnut to that of a man's head.
eagle + stone: the ancients believed that the eagle transported these stones to its nest to facilitate egg-laying. (Wiktionary)