the world > life > the body > digestive or excretive organs > digestive organs > mouth > substance or parts of teeth > [noun] > root (3)
The pointed tapering part of anything which is embedded in something else. The root of a tooth; one of the prongs into which this divides.
A root or fang of a tooth; a root or branch of a tree. Now chiefly dialect.
The stem or straight part of anything. Cf. shaft, n.2 The fang of a tooth. rare.