trito-, trit- +

1. A poetic "foot" consisting of three long syllables and one short syllable.
2. In classical poetry, a metrical foot consisting of three long syllables and one short syllable, and denominated first, second, third, or fourth; depending on the position of the short syllable.

1. Having three cusps, or points; tricuspidate; as, a tricuspid molar.
2. Referring to, or pertaining to, the tricuspid valves; such as, tricuspid obstruction.

The tricuspid valve is the valve consisting of three triangular membranous flaps, at the opening of the right auricle into the right ventricle in the heart of most mammals. Sometimes it is referred to as the tricuspid valves, each flap being regarded as a valve.

In ancient Greek drama, the third actor, whose part is usually that of the evil genius or as a promoter of the sufferings of the protagonist.

A type of partial color deficiency due to a deficiency or abnormality of blue-sensitive retinal cones.

1. A rare condition in which perception of blue and green becomes confused. It is due to the absence of blue-sensitive pigment in the cone cells of the retina.
2. A visual defect in which the retina fails to respond to the color blue; so named from blindness to the color blue, which is regarded as the third primary color.
3. Coined in the early 20th century from Greek tritos "third" plus anopia "blindness". Based on the idea of not seeing a third of the color spectrum.

A group of three cists or chambers in a prehistoric tomb.

1. Belief in three gods, especially the belief or doctrine that the Christian Trinity of Father, Son, and Holy Spirit consist of three distinct divinities.
2. The belief that the Father, Son, and Holy Spirit are three separate and distinct gods; considered to be heretical in orthodox Christianity.

A person who believes in tritheism.

Rule or government by three gods; a group of three divine beings exercising joint rule.

1. A rare radioactive hydrogen isotope with atomic mass three and half-life 12.5 years, prepared artificially for use as a tracer and as a constituent of hydrogen bombs.
2. A radioactive isotope of hydrogen; atoms of tritium have three times the mass of ordinary hydrogen atoms.

The third tine of a deer’s antler in order of development, or the one developed after the third year.

A minor sea god of Greek mythology who had the head and upper body of a man and a dolphin's tail; son of Poseidon and Amphitrite. There is no evidence that this god's name is related to the prefix trito- trit-; however, it might have come from this element.

Triton, as a Greek god, was the messenger of the deep. He is usually represented as a merman, having the upper body of a human and the tail of a fish. Like his father, he carried a trident. Triton's special attribute was a twisted conch shell, on which he blew like a trumpet to calm or raise the waves of the seas.

An interval composed of three whole tones.

The tritone derives its name from the fact that it spans three whole tones and it refers to any musical interval of six semitones.

Two tritones add up to six whole tones or twelve semitones which are usually a perfect octave. An augmented fourth or diminished or flatted fifth is a tritone.

A zooid of the third generation.

A zooid is an individual invertebrate animal that reproduces nonsexually by budding or splitting; especially one that lives in a colony in which each member is joined to others by living material; for example, a coral.

A theory of the development of mammalian molar teeth.

The primitive stage was that of simple cones, as in reptiles. The simple cone then developed a smaller cone in front and another cone behind.

Next, a cingulum was developed, and the three cones became arranged in a triangle, the two smaller cusps having moved to the outer side in the upper molars and to the inner in the lower molars; called the trigon, or trigonid, and in this stage they became the trituberculars or trigonodonts.