fossil bone or tooth of a delicate blue colour, sometimes used as imitation turquoise

The patella of a sheep, formerly used as a charm against cramp.

(mining) smithsonite

A lace made of linen thread, so called because woven with bobbins of bone.

hyoid bone

An oil obtained by heating bones (as in the manufacture of bone black), remarkable for containing the nitrogenous bases, pyridine and quinoline, and their derivatives.

plural of nasal bone

plural of collar-bone

plural of collar bone

(idiomatic) Extremely deep or profound (emotionally).