• WordNet 3.6
    • adj bicuspid having two cusps or points (especially a molar tooth) "bicuspid teeth","bicuspid leaves"
    • n bicuspid a tooth having two cusps or points; located between the incisors and the molars
    • ***
Webster's Revised Unabridged Dictionary
    • a Bicuspid Having two points or prominences; ending in two points; -- said of teeth, leaves, fruit, etc.
    • n Bicuspid (Anat) One of the two double-pointed teeth which intervene between the canines (cuspids) and the molars, on each side of each jaw. See Tooth n.
    • ***
Century Dictionary and Cyclopedia
    • bicuspid Having two points, fangs, or cusps.
    • bicuspid Specifically applied — In geometry, to a curve having two cusps, In human anatomy, to the premolar teeth or false molars, of which there are two on each side above and below, replacing the milk-molars; to the mitral valve guarding the left auriculoventricular orifice of the heart, the corresponding right orifice being guarded by the tricuspid valve, In entomology, to a claw or mandible having two pointed processes or teeth. Also bicuspidal, bicuspidate.
    • n bicuspid One of the premolars or false molars in man, of which there are in the adult two on each side, above and below, between the canines and the true molars. They are the teeth which succeed and replace the milk-molars of the child. Also bicuspis.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Bicuspid bī-kus′pid having two cusps: a pre-molar tooth.
    • ***


Webster's Revised Unabridged Dictionary
See pref. Bi-, and Cuspidate
Chambers's Twentieth Century Dictionary
L. bi-, twice, and Cusp.


In literature:

He's got an appointment with me to have a bicuspid pulled.
"McTeague" by Frank Norris
Next behind the canines follow, on each side, two bicuspids.
"A Practical Physiology" by Albert F. Blaisdell
In man, the bicuspid teeth.
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
He had a gold tooth, the upper left bicuspid gold.
"The Winning Clue" by James Hay, Jr.
Bicuspidate: ending in two points or cusps.
"Explanation of Terms Used in Entomology" by John. B. Smith
When did his malicious ambition first sprout up towards molars and bicuspids?
"Chimney-Pot Papers" by Charles S. Brooks
Lingual cavities in molars and bicuspids can be perfectly preserved with tin.
"Tin Foil and Its Combinations for Filling Teeth" by Henry L. Ambler
The incisors, cuspids, and bicuspids, have each but one root.
"A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition)" by Calvin Cutter
We have known of cases where cuspids, bicuspids, and molars have all been extracted.
"Home Life of Great Authors" by Hattie Tyng Griswold
The upper and lower are both cone-shaped, and the superior first bicuspid exhibits tendency thereto.
"Degeneracy" by Eugene S. Talbot

In news:

I'm a 50-year-old male with a bicuspid aortic valve .

In science:

We say that γx is bicuspidal if and only if it has both its ends in the cusp (in that case there is a point x 6= y ∈ S1 so that γy is γx with reverse orientation); otherwise γx is called unicuspidal.
Simple geodesics on a punctured surface
In Section 4 we show that every simple bicuspidal geodesic γ lies in an open interval of otherwise non-simple geodesics (4.2); this interval is called the deadzone of γ and γ is called the center of the deadzone.
Simple geodesics on a punctured surface
In particular we have that any bicuspidal geodesic lies in a deadzone (a non simple geodesic lies in a deadzone by 5.7 and a simple geodesic is the center of a deadzone); hence since the lifts of the cusp are dense (2.4), so too is the union of the deadzones.
Simple geodesics on a punctured surface
This has two immediate consequences: first every interval of S1 \ K contains exactly one point of E and these points correspond to the bicuspidal geodesics (the centers of the deadzones).
Simple geodesics on a punctured surface
Since eγy is bicuspidal it is contained in a deadzone, say V .
Simple geodesics on a punctured surface