tri-, tre-

The condition of having three waves, a reference to the pulse.

An organ or a part, especially a tooth, having three cusps (points).

1. A velocipede with three wheels, one in the front and two in the rear.
2. A vehicle, used especially now by small children, that has three wheels, one at the front and two a the back, and is usually propelled by pedals.

1. Having three toes, claws, or similar parts on each limb.
2. Having three digits, either fingers or toes; also, tridigitate.

Having three digits on a limb, as with some birds and ancestors of the horse; such as, Protohippus and Hipparion.

An abnormal and irrational fear of the number "13".

1. An instrument or weapon with three prongs; especially, a three-pronged fish-spear or sceptre as the attribute of the sea-god Poseidon or Neptune, also figured as borne by Britannia.
2. A three-pronged spear used by the retiarius in ancient Roman gladiatorial combats.
3. Applied to something resembling a trident in shape or configuration, as a three-pronged fork, a piece of land with three promontories.

Three-toothed, three-pronged.

Relating to or derived from the three primary germ layers of the embryo: ectoderm, endoderm, and mesoderm.

Having three digits (fingers or toes).

Having three fingers or three toes on one hand or foot.

Having or exhibiting three dimensions, as a solid body.

1. Consisting of three days.
2. Occurring three times a day.

1. Existing or lasting for three years, three-years; changed every three years.
2. Recurring every three years.
3. A commemoration or celebration of an event that occurred three years earlier; a third anniversary.

1. Referring to a third anniversary.
2. Descriptive of something which appears or occurs every three years.
3. Referring to a period of three years; triennium.