tri-, tre-
(Greek > Latin: a numerical prefix meaning, three, thrice, threefold; triple; a word element for number 3)
						tricrotism					
					
						The condition of having three waves, a reference to the pulse.					
									
						tricuspid					
					
						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.
									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.
						tridactyl, tridactyle, tridactylous					
					
						1. Having three toes, claws, or similar parts on each limb. 
2. Having three digits, either fingers or toes; also, tridigitate.
									2. Having three digits, either fingers or toes; also, tridigitate.
						tridactyly					
					
						Having three digits on a limb, as with some birds and ancestors of the horse; such as, Protohippus and Hipparion.					
									
						trident					
					
						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.
									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.
						tridentate					
					
						Three-toothed, three-pronged.					
									
						tridermic					
					
						Relating to or derived from the three primary germ layers of the embryo: ectoderm, endoderm, and mesoderm.					
									
						tridigital					
					
						Having three digits (fingers or toes).					
									
						tridigitate, tridactylous					
					
						Having three fingers or three toes on one hand or foot.					
									
						tridimensional					
					
						Having or exhibiting three dimensions, as a solid body.					
									
						tridiurnal (adjective) (not comparable)					
					
						1. Consisting of three days. 
2. Occurring three times a day.
									2. Occurring three times a day.
						triennial					
					
						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.
									2. Recurring every three years.
3. A commemoration or celebration of an event that occurred three years earlier; a third anniversary.
						triennially					
					
						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.
									2. Descriptive of something which appears or occurs every three years.
3. Referring to a period of three years; triennium.
						triennium					
					
						A space or period of three years.					
									
		
