Tooth

1. (Anat.) One of the hard, bony appendages which are borne on the jaws, or on other bones in the walls of the mouth or pharynx of most vertebrates, and which usually aid in the prehension and mastication of food.
2. Fig.: Taste; palate.
3. Any projection corresponding to the tooth of an animal, in shape, position, or office; as, the teeth, or cogs, of a cogwheel; a tooth, prong, or tine, of a fork; a tooth, or the teeth, of a rake, a saw, a file, a card.
4. (Nat. Hist.) An angular or prominence on any edge; as, a tooth on the scale of a fish, or on a leaf of a plant
5. (Zoöl.) Any hard calcareous or chitinous organ found in the mouth of various invertebrates and used in feeding or procuring food; as, the teeth of a mollusk or a starfish.
1. A projecting member resembling a tenon, but fitting into a mortise that is only sunk, not pierced through.
2. One of several steps, or offsets, in a tusk. See Tusk.
In spite of the teeth ,
in defiance of opposition; in opposition to every effort.
In the teeth ,
directly; in direct opposition; in front.
To cast in the teeth ,
to report reproachfully; to taunt or insult one with.
Tooth and nail ,
as if by biting and scratching; with one's utmost power; by all possible means.
Tooth coralline (Zoöl.),
any sertularian hydroid.
Tooth edge ,
the sensation excited in the teeth by grating sounds, and by the touch of certain substances, as keen acids.
Tooth key ,
an instrument used to extract teeth by a motion resembling that of turning a key.
Tooth net ,
a large fishing net anchored.
Tooth ornament . (Arch.)
Same as Dogtooth, n., 2.
Tooth paste ,
a paste for cleaning the teeth; a dentifrice.
Tooth powder ,
a powder for cleaning the teeth; a dentifrice.
Tooth rash . (Med.)
See Red-gum, 1.
To show the teeth ,
to threaten.
To the teeth ,
in open opposition; directly to one's face.

1. To furnish with teeth.
2. To indent; to jag; as, to tooth a saw.
3. To lock into each other. See Tooth, n., 4.