bone meal

bones ground to a coarse powder, used as fertilizer or feed.

Origin of bone meal

An Americanism dating back to 1840–50

Its factories produce nails, wire-work and other metal goods, mead and bone-meal.

Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 8 |Various
I fertilize my orchard with ashes and bone-meal; both are beneficial, but not necessary in good potash soils.

The Apple |Various
When you cut down severely you should give a little extra food in the shape of manure, bone-meal, or Clays Fertilizer.

The Children's Book of Gardening |Mrs. Alfred Sidgwick
In case meat food is given, bone-meal, fed in small quantities, will form a valuable addition to their ration.

The Dollar Hen |Milo M. Hastings

Some of these weak sisters I make the assistant boss of the machine-shop and some of the bone-meal mill.

Old Gorgon Graham |George Horace Lorimer

bone meal

the product of dried and ground animal bones, used as a fertilizer or in stock feeds