Webster's Dictionary, 1913

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Terza rima [ Italian , a third or triple rhyme.] A peculiar and complicated system of versification, borrowed by the early Italian poets from the Troubadours.

Terzetto noun [ Italian , dim. of terzo the third, Latin tertius . See Tierce .] (Mus.) A composition in three voice parts; a vocal (rarely an instrumental) trio.

Tesla coil, Tesla transformer [ After N. Tesla , American electrician.] (Electricity) A transformer without iron, for high frequency alternating or oscillating currents; an oscillation transformer.

Tesselar adjective [ Latin tessella a small square piece, a little cube, dim. of tessera a square piece of stone, wood, etc., a die.] Formed of tesseræ, as a mosaic.

Tessellata noun plural [ New Latin See Tessellate .] (Zoology) A division of Crinoidea including numerous fossil species in which the body is covered with tessellated plates.

Tessellate transitive verb [ imperfect & past participle Tessellated ; present participle & verbal noun Tessellating .] [ Latin tessellatus tessellated. See Tessellar .] To form into squares or checkers; to lay with checkered work.

The floors are sometimes of wood, tessellated after the fashion of France.
Macaulay.

Tessellate adjective [ Latin tesselatus .] Tessellated.

Tessellated adjective
1. Formed of little squares, as mosaic work; checkered; as, a tessellated pavement.

2. (Bot. & Zoology) Marked like a checkerboard; as, a tessellated leaf.

Tessellation noun The act of tessellating; also, the mosaic work so formed. J. Forsyth.

Tessera noun ; plural Tesseræ . [ Latin , a square piece, a die. See Tessellar .] A small piece of marble, glass, earthenware, or the like, having a square, or nearly square, face, used by the ancients for mosaic, as for making pavements, for ornamenting walls, and like purposes; also, a similar piece of ivory, bone, wood, etc., used as a ticket of admission to theaters, or as a certificate for successful gladiators, and as a token for various other purposes. Fairholt.

Tesseraic adjective Diversified by squares; done in mosaic; tessellated. [ Obsolete] Sir R. Atkyns (1712).

Tesseral adjective
1. Of, pertaining to, or containing, tesseræ.

2. (Crystallog.) Isometric.

Tessular adjective (Crystallog.) Tesseral.

Test noun [ Middle English test test, or cupel, potsherd, French têt , from Latin testum an earthen vessel; akin to testa a piece of burned clay, an earthen pot, a potsherd, perhaps for tersta , and akin to torrere to patch, terra earth (cf. Thirst , and Terrace ), but confer Zend tasta cup. Confer Test a shell, Testaceous , Tester a covering, a coin, Testy , Tête-à- tête .]
1. (Metal.) A cupel or cupelling hearth in which precious metals are melted for trial and refinement.

Our ingots, tests , and many mo.
Chaucer.

2. Examination or trial by the cupel; hence, any critical examination or decisive trial; as, to put a man's assertions to a test . "Bring me to the test ." Shak.

3. Means of trial; as, absence is a test of love.

Each test every light her muse will bear.
Dryden.

4. That with which anything is compared for proof of its genuineness; a touchstone; a standard.

Life, force, and beauty must to all impart,
At once the source, and end, and test of art.
Pope.

5. Discriminative characteristic; standard of judgment; ground of admission or exclusion.

Our test excludes your tribe from benefit.
Dryden.

6. Judgment; distinction; discrimination.

Who would excel, when few can make a test
Betwixt indifferent writing and the best?
Dryden.

7. (Chemistry) A reaction employed to recognize or distinguish any particular substance or constituent of a compound, as the production of some characteristic precipitate; also, the reagent employed to produce such reaction; thus, the ordinary test for sulphuric acid is the production of a white insoluble precipitate of barium sulphate by means of some soluble barium salt.

Test act (Eng. Law) , an act of the English Parliament prescribing a form of oath and declaration against transubstantiation, which all officers, civil and military, were formerly obliged to take within six months after their admission to office. They were obliged also to receive the sacrament according to the usage of the Church of England. Blackstone. -- Test object (Optics) , an object which tests the power or quality of a microscope or telescope, by requiring a certain degree of excellence in the instrument to determine its existence or its peculiar texture or markings. -- Test paper . (a) (Chemistry) Paper prepared for use in testing for certain substances by being saturated with a reagent which changes color in some specific way when acted upon by those substances; thus, litmus paper is turned red by acids, and blue by alkalies, turmeric paper is turned brown by alkalies, etc. (b) (Law) An instrument admitted as a standard or comparison of handwriting in those jurisdictions in which comparison of hands is permitted as a mode of proving handwriting. -- Test tube . (Chemistry) (a) A simple tube of thin glass, closed at one end, for heating solutions and for performing ordinary reactions. (b) A graduated tube.

Syn. -- Criterion; standard; experience; proof; experiment; trial. -- Test , Trial . Trial is the wider term; test is a searching and decisive trial . It is derived from the Latin testa (earthen pot), which term was early applied to the fining pot , or crucible , in which metals are melted for trial and refinement. Hence the peculiar force of the word, as indicating a trial or criterion of the most decisive kind.

I leave him to your gracious acceptance, whose trial shall better publish his commediation.
Shak.

Thy virtue, prince, has stood the test of fortune,
Like purest gold, that tortured in the furnace,
Comes out more bright, and brings forth all its weight.
Addison.

Test transitive verb [ imperfect & past participle Tested ; present participle & verbal noun Testing .]
1. (Metal.) To refine, as gold or silver, in a test, or cupel; to subject to cupellation.

2. To put to the proof; to prove the truth, genuineness, or quality of by experiment, or by some principle or standard; to try; as, to test the soundness of a principle; to test the validity of an argument.

Experience is the surest standard by which to test the real tendency of the existing constitution.
Washington.

3. (Chemistry) To examine or try, as by the use of some reagent; as, to test a solution by litmus paper.

Test noun [ Latin testis . Confer Testament , Testify .] A witness. [ Obsolete]

Prelates and great lords of England, who were for the more surety tests of that deed.
Ld. Berners.

Test intransitive verb [ Latin testari . See Testament .] To make a testament, or will. [ Obsolete]

Test Tes"ta noun ; plural English Tests , Latin Testæ . [ Latin testa a piece of burned clay, a broken piece of earthenware, a shell. See Test a cupel.]
1. (Zoology) The external hard or firm covering of many invertebrate animals.

» The test of crustaceans and insects is composed largely of chitin; in mollusks it is composed chiefly of calcium carbonate, and is called the shell .

2. (Botany) The outer integument of a seed; the episperm, or spermoderm.

Testable adjective [ See Testament .]
1. Capable of being tested or proved.

2. Capable of being devised, or given by will.

Testacea noun plural [ New Latin , from Latin testaceum a shelled anumal. See Testaceous .] (Zoology) Invertebrate animals covered with shells, especially mollusks; shellfish.

Testacean noun (Zoology) Onr of the Testacea.

Testaceography noun [ Testacea + -graphy : confer French testacéographie .] The science which treats of testaceans, or shellfish; the description of shellfish. [ R.]

Testaceology noun [ Testacea + -logy : confer French testacéologie .] The science of testaceous mollusks; conchology. [ R.]

Testaceous adjective [ Latin testaceus , from testa a shell. See Testa .]
1. Of or pertaining to shells; consisted of a hard shell, or having a hard shell.

2. (Bot. & Zoology) Having a dull red brick color or a brownish yellow color.

Testaceous animals (Zoology) , animals having a firm, calcareous shell, as oysters and clams, thus distinguished from crustaceous animals , whose shells are more thin and soft, and consist of several joints, or articulations, as lobsters and crabs.

Testacy noun [ See Testate .] (Law) The state or circumstance of being testate, or of leaving a valid will, or testament, at death.

Testament noun [ French, from Latin testamentum , from testari to be a witness, to make one's last will, akin to testis a witness. Confer Intestate , Testify .]
1. (Law) A solemn, authentic instrument in writing, by which a person declares his will as to disposal of his estate and effects after his death.

» This is otherwise called a will , and sometimes a last will and testament . A testament , to be valid, must be made by a person of sound mind; and it must be executed and published in due form of law. A man, in certain cases, may make a valid will by word of mouth only. See Nuncupative will , under Nuncupative .

2. One of the two distinct revelations of God's purposes toward man; a covenant; also, one of the two general divisions of the canonical books of the sacred Scriptures, in which the covenants are respectively revealed; as, the Old Testament ; the New Testament ; -- often limited, in colloquial language, to the latter.

He is the mediator of the new testament . . . for the redemption of the transgressions that were under the first testament .
Hebrew ix. 15.

Holographic testament , a testament written wholly by the testator himself. Bouvier.

Testamental adjective [ Latin testamentalis .] Of or pertaining to a testament; testamentary.

Thy testamental cup I take,
And thus remember thee.
J. Montgomery.

Testamentary adjective [ Latin testamentarius : confer French testamentaire .]
1. Of or pertaining to a will, or testament; as, letters testamentary .

2. Bequeathed by will; given by testament.

How many testamentary charities have been defeated by the negligence or fraud of executors!
Atterbury.

3. Done, appointed by, or founded on, a testament, or will; as, a testamentary guardian of a minor, who may be appointed by the will of a father to act in that capacity until the child becomes of age.

Testamentation noun The act or power of giving by testament, or will. [ R.] Burke.

Testamentize intransitive verb To make a will. [ Obsolete] Fuller.

Testamur noun [ Latin , we testify, from testari to testify.] (Eng. Universities) A certificate of merit or proficiency; -- so called from the Latin words, Ita testamur , with which it commences.

Testate adjective [ Latin testatus , past participle of testari . See Testament .] (Law) Having made and left a will; as, a person is said to die testate . Ayliffe.

Testate noun (Law) One who leaves a valid will at death; a testate person. [ R.]

Testation noun [ Latin testatio .] A witnessing or witness. [ Obsolete] Bp. Hall.

Testator noun [ Latin : confer French testateur .] (Law) A man who makes and leaves a will, or testament, at death.

Testatrix noun [ Latin ] (Law) A woman who makes and leaves a will at death; a female testator.

Teste noun [ So called from Latin teste , abl. of testis a witness, because this was formerly the initial word in the clause.] (Law) (a) A witness. (b) The witnessing or concluding clause, duty attached; -- said of a writ, deed, or the like. Burrill.

Tester noun [ Middle English testere a headpiece, helmet, Old French testiere , French têtière a head covering, from Old French teste the head, French tête , from Latin testa an earthen pot, the skull. See Test a cupel, and confer Testière .]
1. A headpiece; a helmet. [ Obsolete]

The shields bright, testers , and trappures.
Chaucer.

2. A flat canopy, as over a pulpit or tomb. Oxf. Gross.

3. A canopy over a bed, supported by the bedposts.

No testers to the bed, and the saddles and portmanteaus heaped on me to keep off the cold.
Walpole.

Tester noun [ For testern , teston , from French teston , from Old French teste the head, the head of the king being impressed upon the coin. See Tester a covering, and confer Testone , Testoon .] An old French silver coin, originally of the value of about eighteen pence, subsequently reduced to ninepence, and later to sixpence, sterling. Hence, in modern English slang, a sixpence; -- often contracted to tizzy . Called also teston . Shak.

Testern noun A sixpence; a tester. [ Obsolete]

Testern transitive verb To present with a tester. [ Obsolete] Shak.

Testes noun , plural of Teste , or of Testis .

Testicardines noun plural [ New Latin See Test a shell, and Cardo .] (Zoology) A division of brachiopods including those which have a calcareous shell furnished with a hinge and hinge teeth. Terebratula and Spirifer are examples.

Testicle noun [ Latin testiculus , dim. of testis a testicle, probably the same word as testis a witness, as being a witness to manhood. Confer Test a witness.] (Anat.) One of the essential male genital glands which secrete the semen.

Testicond adjective [ Latin testis testis + condere to hide.] (Zoology) Having the testicles naturally concealed, as in the case of the cetaceans.

Testicular adjective (Anat.) Of or pertaining to the testicle.

Testiculate adjective [ New Latin testiculatus .] (Botany) (a) Shaped like a testicle, ovate and solid. (b) Having two tubers resembling testicles in form, as some species of orchis.

Testière noun [ Old French testiere . See Tester a headpiece.] A piece of plate armor for the head of a war horse; a tester.

Testif adjective [ See Testy .] Testy; headstrong; obstinate. [ Obsolete]

Testif they were and lusty for to play.
Chaucer.

Testification noun [ Latin testificatio : confer Old French testification . See Testify .] The act of testifying, or giving testimony or evidence; as, a direct testification of our homage to God. South.