tri-, tre-
(Greek > Latin: three, thrice, threefold; a numerical prefix)
trihydric
Denoting a chemical compound containing three replaceable hydrogen atoms.
triiniodymus
A grossly malformed fetus with three heads, joined at the occiput, and a single body.
trilabe
A three-pronged forceps for removal of foreign bodies from the bladder.
trilarcenous
A triple conviction of larceny.
trilateral
1. A three-sided figure; a triangle.
2. Having or involving three sides, countries, or parties.
trilateralism
The practice of engaging in three-party relations, agreements, or negotiations.
trilemma
1. A situation, or (in Logic) a syllogism, of the nature of a dilemma, but involving three alternatives instead of two.
2. A situation offering three undesirable options.
trilingual
Speaking or using, written or expressed in, or relating to three languages.
trilith, trilithon
A massive prehistoric stone structure, resembling a doorway, consisting of two vertical stones with a third supported horizontally by the other two.
trillion
1. The cardinal number equal to 1012.
2. Primarily British, the cardinal number equal to 1018.
trilobate, trilobed
Having three lobes.
trilocular
Having three cavities or cells.
trilogue
A group of three words or sayings.
trilogy
1. In Greek antiquity, a series of three tragedies (originally connected in subject), performed at Athens at the festival of Dionysus.
2. Any series or group of three related dramatic or other literary works.
3. A group of three related utterances, sayings, subjects, etc.
trimachia
A series of three battles or a contest between three.
Cross references of word families that are related, partially or totally, to: "three, third":
terce-;
terti-;
trigono-;
trito-.
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