tri-, tre-
(Greek > Latin: a numerical prefix meaning, three, thrice, threefold; triple; a word element for number 3)
An ancient constellation shaped like an equilateral form with three equal sides: Between the constellations Andromeda and Aries there is a Triangulum.
Triangulum is a small constellation in the northern sky. Its name is Latin for "triangle", derived from its three brightest stars, which form a long and narrow triangle. Known to the ancient Babylonians and Greeks, Triangulum was one of the 48 constellations listed by the 2nd century astronomer Ptolemy.
triannual
1. Occurring every three years; lasting for three years; equal to triennial.
2. Occurring three times a year.
2. Occurring three times a year.
trianthous
Having three flowers.
triapsidal
Having three apses, as most Greek churches.
triarch
The ruler of one of three divisions of a country or territory.
triarchy
1. The government or jurisdiction of a triarch; one of three divisions of a country ruled by triarchs.
2. Government by three rulers or powers jointly; three persons associated in government, a triumvirate.
3. A group of three districts or divisions of a country each under its own ruler.
2. Government by three rulers or powers jointly; three persons associated in government, a triumvirate.
3. A group of three districts or divisions of a country each under its own ruler.
Triassic
In geology, the lowest of three major divisions of fossiliferous rocks which together make up the Mesozoic or Secondary series, namely: Triassic; Jurassic; and Cretaceous.
It lies above the Permian and below the Jurassic.
An intense athletic-endurance competition in which all participants must swim, ride a bicycle, and run particular distances without stopping between each of the events.
tribrachial
A figure or utensil with three arms, especially a three-branched flint.
tribrachius
A deformed fetus, usually conjoined twins, having three arms.
tribrachteatel
In botany, having three bracts.
Tribus unum.
From three, one.
Motto of Trinity University, San Antonio, Texas, USA.
tricameral
A reference to a legislature composed of three chambers.
tricennial
1. Pertaining to thirty years.
2. Consisting of thirty years.
3. Occurring once in every thirty years.
4. Etymology: from Latin tricennium, "thirty years"; from triginta "thirty" + annus, "year" (tricennalis).
2. Consisting of thirty years.
3. Occurring once in every thirty years.
4. Etymology: from Latin tricennium, "thirty years"; from triginta "thirty" + annus, "year" (tricennalis).
tricentenarian
A person who is three-hundred years old.
