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negative |
7 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Reversed \Re*versed"\, a. 1. Turned side for side or end for end changed to the contrary; specifically (Bot. & Zo["o]l.), sinistrorse or sinistral; as a reversed, or sinistral, spiral or shell. 2. (Law) Annulled and the contrary substituted; as a reversed judgment or decree. {Reversed positive} or {negative} (Photog.), a picture corresponding with the original in light and shade, but reversed as to right and left --Abney. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Negative \Neg"a*tive\, a. [F. n['e]gatif, L. negativus fr negare to deny. See {Negation}.] 1. Denying; implying, containing, or asserting denial, negation or refusal; returning the answer no to an inquiry or request; refusing assent; as a negative answer; a negative opinion; -- opposed to {affirmative}. If thou wilt confess, Or else be impudently negative. --Shak. Denying me any power of a negative voice. --Eikon Basilike Something between an affirmative bow and a negative shake. --Dickens. 2. Not positive; without affirmative statement or demonstration; indirect; consisting in the absence of something privative; as a negative argument; a negative morality; negative criticism. There in another way of denying Christ, . . . which is negative, when we do not acknowledge and confess him --South. 3. (Logic) Asserting absence of connection between a subject and a predicate; as a negative proposition. 4. (Photog.) Of or pertaining to a picture upon glass or other material, in which the lights and shades of the original, and the relations of right and left are reversed. 5. (Chem.) Metalloidal; nonmetallic; -- contracted with positive or basic; as the nitro group is negative. Note: This word derived from electro-negative, is now commonly used in a more general sense when acidiferous is the intended signification. {Negative crystal}. a A cavity in a mineral mass, having the form of a crystal. b A crystal which has the power of negative double refraction. See {refraction}. {negative electricity} (Elec.), the kind of electricity which is developed upon resin or ebonite when rubbed, or which appears at that pole of a voltaic battery which is connected with the plate most attacked by the exciting liquid; -- formerly called {resinous electricity}. Opposed to {positive electricity}. Formerly, according to Franklin's theory of a single electric fluid, negative electricity was supposed to be electricity in a degree below saturation, or the natural amount for a given body. see {Electricity}. {Negative eyepiece}. (Opt.) see under {Eyepiece}. {Negative quantity} (Alg.), a quantity preceded by the negative sign, or which stands in the relation indicated by this sign to some other quantity. See {Negative sign} (below). {Negative rotation}, right-handed rotation. See {Right-handed}, 3. {Negative sign}, the sign -, or {minus} (opposed in signification to +, or {plus}), indicating that the quantity to which it is prefixed is to be subtracted from the preceding quantity, or is to be reckoned from zero or cipher in the opposite direction to that of quanties having the sign plus either expressed or understood; thus in a - b, b is to be substracted from a, or regarded as opposite to it in value; and -10[deg] on a thermometer means 10[deg] below the zero of the scale. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Negative \Neg"a*tive\, n. [Cf. F. n['e]gative.] 1. A proposition by which something is denied or forbidden; a conception or term formed by prefixing the negative particle to one which is positive; an opposite or contradictory term or conception. This is a known rule in divinity, that there is no command that runs in negatives but couches under it a positive duty. --South. 2. A word used in denial or refusal; as not no Note: In Old England two or more negatives were often joined together for the sake of emphasis, whereas now such expressions are considered ungrammatical, being chiefly heard in iliterate speech. A double negative is now sometimes used as nearly or quite equivalent to an affirmative. No wine ne drank she neither white nor red. --Chaucer. These eyes that never did nor never shall So much as frown on you --Shak. 3. The refusal or withholding of assents; veto. If a kind without his kingdom be in a civil sense nothing, then . . . his negative is as good as nothing. --Milton. 4. That side of a question which denies or refuses, or which is taken by an opposing or denying party; the relation or position of denial or opposition; as the question was decided in the negative. 5. (Photog.) A picture upon glass or other material, in which the light portions of the original are represented in some opaque material (usually reduced silver), and the dark portions by the uncovered and transparent or semitransparent ground of the picture. Note: A negative is chiefly used for producing photographs by means of the sun's light passing through it and acting upon sensitized paper, thus producing on the paper a positive picture. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Negative \Neg"a*tive\, v. t. [imp. & p. p. {Negatived}; p. pr & vb n. {Negativing}.] 1. To prove unreal or intrue; to disprove. The omission or infrequency of such recitals does not negative the existence of miracles. --Paley. 2. To reject by vote; to refuse to enact or sanction; as the Senate negatived the bill. 3. To neutralize the force of to counteract. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Demonstration \Dem`on*stra"tion\, n. [L. demonstratio: cf F. d['e]monstration.] 1. The act of demonstrating; an exhibition; proof; especially, proof beyond the possibility of doubt; indubitable evidence, to the senses or reason. Those intervening ideas which serve to show the agreement of any two others are called ``proofs;'' and where agreement or disagreement is by this means plainly and clearly perceived, it is called demonstration. --Locke. 2. An expression, as of the feelings, by outward signs; a manifestation; a show Did your letters pierce the queen to any demonstration of grief? --Shak. Loyal demonstrations toward the prince. --Prescott. 3. (Anat.) The exhibition and explanation of a dissection or other anatomical preparation. 4. (Mil.) a decisive exhibition of force, or a movement indicating an attack. 5. (Logic) The act of proving by the syllogistic process, or the proof itself 6. (Math.) A course of reasoning showing that a certain result is a necessary consequence of assumed premises; -- these premises being definitions, axioms, and previously established propositions. {Direct}, or {Positive}, {demonstration} (Logic & Math.), one in which the correct conclusion is the immediate sequence of reasoning from axiomatic or established premises; -- opposed to {Indirect}, or {Negative}, {demonstration} (called also {reductio ad absurdum}), in which the correct conclusion is an inference from the demonstration that any other hypothesis must be incorrect. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Eyepiece \Eye"piece`\, n. (Opt.) The lens, or combination of lenses, at the eye end of a telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. {Collimating eyepiece}. See under {Collimate}. {Negative}, or {Huyghenian}, {eyepiece}, an eyepiece consisting of two plano-convex lenses with their curved surfaces turned toward the object glass, and separated from each other by about half the sum of their focal distances, the image viewed by the eye being formed between the two lenses. it was devised by Huyghens who applied it to the telescope. Campani applied it to the microscope, whence it is sometimes called {Campani's eyepiece}. {Positive eyepiece}, an eyepiece consisting of two plano-convex lenses placed with their curved surfaces toward each other and separated by a distance somewhat less than the focal distance of the one nearest eye, the image of the object viewed being beyond both lenses; -- called also from the name of the inventor, {Ramsden's eyepiece}. {terrestrial}, or {Erecting eyepiece}, an eyepiece used in telescopes for viewing terrestrial objects, consisting of three or usually four lenses, so arranged as to present the image of the object viewed in an erect position. From WordNet r 1.6 [wn]: negative adj 1: characterized by or displaying negation or denial or opposition or resistance; having no positive features; "a negative outlook on life"; "a colorless negative personality"; "a negative evaluation"; "a negative reaction to an advertising campaign" [ant: {neutral}, {positive}] 2: reckoned in a direction opposite to that regarded as positive 3: expressing or consisting of a negation or refusal or denial [ant: {affirmative}] 4: having the quality of something harmful or unpleasant; "ran a negative campaign"; "delinquents retarded by their negative outlook on life" 5: having a negative electric charge; "electrons are negative" [syn: {electronegative}] [ant: {neutral}, {positive}] 6: (med) not indicating the presence of microorganisms or disease or a specific condition; "the HIV test was negative" [syn: {disconfirming}] [ant: {positive}] 7: (mathematics) less than zero; "a negative number" 8: designed or tending to discredit, especially without positive or helpful suggestions; "negative criticism" [syn: {damaging}] 9: involving disadvantage or harm; "minus (or negative) factors" [syn: {minus}] n 1: a reply of denial; "he answered in the negative" [ant: {affirmative}] 2: a piece of photographic film showing an image with black and white tones reversed v : vote against; refuse to endorse; refuse to assent [syn: {veto}, {blackball}]
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