Resembling a tortoise shell in appearance or structure; roofed; arched; vaulted.

Resembling the shell of a tortoise.

A genus of tortoises which formerly included a large number of diverse forms, but is now restricted to certain terrestrial species, such as the European land tortoise (Testudo Graeca) and the gopher of the Southern United States.

Fretful; peevish; petulant; easily irritated.

A substance (notably nux vomica, strychnine, and brucine) which, either as a remedy or a poison, acts primarily on the spinal cord, and which, when taken in comparatively large quantity, produces tetanic spasms or convulsions.

A poisonous base (ptomaine) formed in meat broth through the agency of a peculiar microbe from the wound of a person who has died of tetanus; -- so called because it produces tetanus as one of its prominent effects.

The production or condition of tetanus.

To throw, as a muscle, into a state of permanent contraction; to cause tetanus in. See Tetanus, n., 2.

Resembling tetanus.

An instrument from tetanizing a muscle by irritating its nerve by successive mechanical shocks.

A painful and usually fatal disease, resulting generally from a wound, and having as its principal symptom persistent spasm of the voluntary muscles. When the muscles of the lower jaw are affected, it is called locked-jaw, or lickjaw, and it takes various names from the various incurvations of the body resulting from the spasm.

A morbid condition resembling tetanus, but distinguished from it by being less severe and having intermittent spasms.

A gobioid fish (Eleotris gyrinus) of the Southern United States; -- called also sleeper.

Having one fourth the number of planes which are requisite to complete symmetry.

The property of being tetartohedral.

See Tautog.

See Techiness.

See Techy.

A kind of wig; false hair.

Face to face; privately or confidentially; familiarly.

A work thrown up at the end of a bridge nearest the enemy, for covering the communications across a river; a bridgehead.

A large African antelope (Alcelaphus tora). It has widely divergent, strongly ringed horns.

To confine, as an animal, with a long rope or chain, as for feeding within certain limits.

A game played with rackets and a ball suspended by a string from an upright pole, the object of each side being to wrap the string around the pole by striking the ball in a direction opposite to the other.

A tunicate.

A division of Tunicata including the common attached ascidians, both simple and compound. Called also Tethioidea.

A genus of a large naked mollusks having a very large, broad, fringed cephalic disk, and branched dorsal gills. Some of the species become a foot long and are brilliantly colored.

Capable of neutralizing four molecules of a monacid base; having four hydrogen atoms capable of replacement by bases; quadribasic; -- said of certain acids; thus, normal silicic acid, Si(OH)4, is a tetrabasic acid.

Same as Pyroboric.

An order of Cephalopoda having four gills. Among living species it includes only the pearly nautilus. Numerous genera and species are found in the fossil state, such as Ammonites, Baculites, Orthoceras, etc.

Of or pertaining to the Tetrabranchiata. One of the Tetrabranchiata.

Composed of four carpels.

A scale series of four sounds, of which the extremes, or first and last, constituted a fourth. These extremes were immutable; the two middle sounds were changeable.

Having a division by fours; separated into four parts or series, or into series of fours.

Capable of neutralizing four molecules of a monobasic acid; having four hydrogen atoms capable of replacement ba acids or acid atoms; -- said of certain bases; thus, erythrine, C4H6(OH)4, is a tetracid alcohol.

Having four cocci, or carpels.

A stanza or division in lyric poetry, consisting of four verses or lines.

Same as Rugosa.

Any species of sponge of the division Tetractinellida. Also used adjectively.

A division of Spongiae in which the spicules are siliceous and have four branches diverging at right angles. Called also Tetractinellinae.

The number four; a collection of four things; a quaternion.

Tetradactylous.

Having, or characterized by, four digits to the foot or hand.

A light oily hydrocarbon, C14H30, of the marsh-gas series; -- so called from the fourteen carbon atoms in the molecule.

Same as Arthrostraca.

Of or pertaining to a tetrad; possessing or having the characteristics of a tetrad; as, a carbon is a tetradic element.

A person in some way remarkable with regard to the number four, as one born on the fourth day of the month, or one who reverenced four persons in the Godhead.

See Tetrodon.

See Tetrodont.

A silver coin among the ancient Greeks, of the value of four drachms.

A telluride of bismuth. It is of a pale steel-gray color and metallic luster, and usually occurs in foliated masses. Called also telluric bismuth.

A Linnaean class of plants having six stamens, four of which are longer than the others.

A plant of the order Tetradynamia.

Belonging to the order Tetradynamia; having six stamens, four of which are uniformly longer than the others.

A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc.

Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers.

The mystic number four, which was often symbolized to represent the Deity, whose name was expressed by four letters among some ancient nations; as, the Hebrew JeHoVaH, Greek qeo`s, Latin deus, etc.

A Linnaean order of plants having four styles.

Belonging to the order Tetragynia; having four styles.

Having, or composed of, four sides.

A sulphide of antimony and copper, with small quantities of other metals. It is a very common ore of copper, and some varieties yield a considerable presentage of silver. Called also gray copper ore, fahlore, and panabase.

A solid figure inclosed or bounded by four triangles.

Pertaining to a tetrahexahedron.

A solid in the isometric system, bounded by twenty-four equal triangular faces, four corresponding to each face of the cube.

A chemical substance (C21H20O2) which is produced by the hemp plant (Cannabis sativa), and is the physiologically active agent of dried preparations of that plant, called variously marijuana, hashish, ganja, hemp, etc.; also called THC. It causes the euphoric effect for which the preparations are smoked or chewed. It is used in medicine in a purified form as an antiemetic (an antinausea agent), especially in conjunction with chemotherapy of cancer. It occurs primarily as the /1-3,4-trans isomer, also called /9-THC, with small amounts of the /6-3,4-trans isomer detectable at about 1%. It is a controlled substance, classified as a hallucinogen, and its possession or distribution is illegal in almost all states of the United States.

A tetrahexahedron.

A hydrocarbon, C24H50, resembling paraffin, and like it belonging to the marsh-gas series; -- so called from having twenty-four atoms of carbon in the molecule.

A group or series of four dramatic pieces, three tragedies and one satyric, or comic, piece (or sometimes four tragedies), represented consequently on the Attic stage at the Dionysiac festival.

A division of Coleoptera having, apparently, only four tarsal joints, one joint being rudimentary.

Having the parts arranged in sets of four; as, a tetramerous flower.

A verse or line consisting of four measures, that is, in iambic, trochaic, and anapestic verse, of eight feet; in other kinds of verse, of four feet.

A hypothetical hydrocarbon, C4H8, analogous to trimethylene, and regarded as the base of well-known series or derivatives. Sometimes, an isomeric radical used to designate certain compounds which are really related to butylene.

The union of the four attributes of the Evangelists in one figure, which is represented as winged, and standing on winged fiery wheels, the wings being covered with eyes. The representations of it are evidently suggested by the vision of Ezekiel (ch. i.)

A Linnaean class of plants having four stamens.

Belonging to the class Tetrandria.

A bird belonging to the tribe of which the genus Tetrao is the type, as the grouse, partridge, quail, and the like. Used also adjectively.

Containing four distinct petals, or flower leaves; as, a tetrapetalous corolla.

A combination of wax, resin, lard, and pitch, composing an ointment.

Furfuran.

Having four leaves; consisting of four distinct leaves or leaflets.

A Bible consisting of four different Greek versions arranged in four columns by Origen; hence, any version in four languages or four columns.

A division of Arachnida including those spiders which have four lungs, or pulmonary sacs. It includes the bird spiders (Mygale) and the trapdoor spiders. See Mygale.

One of the Tetrapneumona.

An insect characterized by having but four perfect legs, as certain of the butterflies.

A set of four feet; a measure or distance of four feet.

An insect having four wings.

Having four wings.

A noun that has four cases only.

Four.

A tetrarchy.

Of or pertaining to a tetrarch or tetrarchy.

The district under a Roman tetrarch; the office or jurisdiction of a tetrarch; a tetrarchate.

Characterized by division into four parts.

Having four sepals.

A machine in which four pulleys act together.

Having four seeds.

A nonsexual spore, one of a group of four regularly occurring in red seaweeds.

A stanza, epigram, or poem, consisting of four verses or lines.

Having four columns in front; -- said of a temple, portico, or colonnade. A tetrastyle building.

Consisting of, or having, four syllables; quadrisyllabic.

A word consisting of four syllables; a quadrisyllable.

Having four loculaments, or thecae.

A salt of tetrathionic acid.

Of, pertaining to, or designating, a thionic derivative, H2S4O6, of sulphuric acid, obtained as a colorless, odorless liquid.

Consisting of four atoms; having four atoms in the molecule, as phosphorus and arsenic. Having a valence of four; quadrivalent; tetravalent; sometimes, in a specific sense, having four hydroxyl groups, whether acid or basic.

The quality or state of being tetravalent; quadrivalence.

Having a valence of four; tetratomic; quadrivalent.

Having four branches diverging at right angles; -- said of certain spicules of sponges.

A combining form (also used adjectively), designating any one of a series of double derivatives of the azo and diazo compounds containing four atoms of nitrogen.

A crystalline acid substance, CH2N4, which may be regarded as pyrrol in which nitrogen atoms replace three CH groups; also, any of various derivatives of the same.

Any one of a certain series of basic compounds containing a chain of four nitrogen atoms; for example, ethyl tetrazone, (C2H5)2N.N2.N(C2H5)2, a colorless liquid having an odor of leeks.

Forward; perverse; harsh; sour; rugged.

Crabbedness; perverseness.

Tetric.

Of, pertaining to, or designating, a complex ketonic acid, C5H6O3, obtained as a white crystalline substance; -- so called because once supposed to contain a peculiar radical of four carbon atoms. Called also acetyl-acrylic acid.

Any one of numerous species of plectognath fishes belonging to Tetrodon and allied genera. Each jaw is furnished with two large, thick, beaklike, bony teeth.

Of or pertaining to the tetrodons. A tetrodon.

A hypothetical hydrocarbon, C4H4, analogous to benzene; -- so called from the four carbon atoms in the molecule.

Of, pertaining to, or designating, an acid, C3H3.CO2H, of the acetylene series, homologous with propiolic acid, obtained as a white crystalline substance.

A monosaccharide derived from a certain alcohol.