bone earth

noun

1. bone ash.

Word History and Origins

Origin of bone earth¹

First recorded in 1850–55

Example Sentences

When we get old, they contain so much bone-earth that they become more brittle, and often break very easily.

From Project Gutenberg

When we are young, the bones have less of this bone-earth, and so they bend easily, and readily get out of shape.

From Project Gutenberg

The soil called bone-earth is, in fact, found under the crystalline bed which covers the ground of the caverns.

From Project Gutenberg

To these facts may be added the presence of thick beds and veins of iron ore and of apatite or calcium phosphate (bone earth).

From Project Gutenberg