| TETRACID | • tetracid adj. (Obsolete, chemistry) tetrabasic. • tetracid n. A tetracarboxylic acid. • TETRACID n. a substance capable of neutralizing four molecules of a monobasic acid. |
| TETRACTS | • tetracts n. Plural of tetract. • TETRACT n. a sponge spicule, also TETRAXON. |
| TETRADIC | • tetradic adj. Of or relating to a tetrad. • tetradic adj. (Of a shape) Having four-fold symmetry; used especially of the digits 0, 1 and 8. • TETRADIC adj. of or pertaining to a tetrad; as, a carbon is a tetradic element. |
| TETRAGON | • tetragon n. (Geometry, rare) Quadrilateral. • tetragon n. An aspect of two planets with regard to the Earth when they are distant from each other ninety degrees… • TETRAGON n. a four-sided polygon. |
| TETRAMER | • tetramer n. (Chemistry) An oligomer having four subunits. • TETRAMER n. a polymer consisting of four identical isomers. |
| TETRAPLA | • tetrapla n. A text presented in four parallel versions, especially (historical) the version of the Bible presented… • TETRAPLA n. (Greek) an edition of four parallel texts, esp. Origen's of the Old Testament. |
| TETRAPOD | • tetrapod n. Any vertebrate with four limbs. • tetrapod n. Any vertebrate (such as birds or snakes) that has evolved from early tetrapods; especially any member… • tetrapod n. A concrete structure with arms, used to arrest wave energy along the shore in sea defence projects. |
| TETRARCH | • tetrarch n. A governor or ruler of a quarter of a country, especially of a fourth part of a province in or client… • tetrarch n. Each of the four members of a jointly ruling tetrarchy, notably of the Roman Empire since Diocletian. • tetrarch n. An officer in charge of a fourth part of a phalanx in Ancient Greece. |
| TETRAXON | • tetraxon n. A tetraxonal spicule of a sponge. • TETRAXON n. a sponge spicule, also TETRACT. |
| TETRODES | • tetrodes n. Plural of tetrode. • TETRODE n. a type of electron tube. |
| TETRONAL | • tetronal n. A sedative-hypnotic and anesthetic drug. • TETRONAL n. a hypnotic and sedative drug, rarely used because of its toxicity. |
| TETROSES | • tetroses n. Plural of tetrose. • TETROSE n. a sugar whose molecules contain four carbon atoms. |
| TETROXID | • tetroxid n. Archaic form of tetroxide. • TETROXID n. an oxide having four atoms of oxygen in the molecule; as, osmium tetroxide, also TETROXIDE. |