Webster's Dictionary, 1913

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Indoor adjective Done or being within doors; within a house or institution; domestic; as, indoor work.

Indoors adverb Within the house; -- usually separated, in doors .

Indophenol noun [ Ind igo + phenol .] (Chemistry) Any one of a series of artificial blue dyestuffs, resembling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper has not yet been isolated.

Indorsable adjective Capable of being indorsed; transferable; convertible.

Indorsation noun Indorsement. [ Obsolete]

Indorse transitive verb [ imperfect & past participle Indorsed ; present participle & verbal noun Indorsing .] [ Late Latin indorsare . See Endorse .] [ Written also endorse .]


1. To cover the back of; to load or burden. [ Obsolete]

Elephants indorsed with towers.
Milton.

2. To write upon the back or outside of a paper or letter, as a direction, heading, memorandum, or address.

3. (Law & Com.) To write one's name, alone or with other words, upon the back of (a paper), for the purpose of transferring it, or to secure the payment of a note, draft, or the like; to guarantee the payment, fulfillment, performance, or validity of, or to certify something upon the back of (a check, draft, writ, warrant of arrest, etc.).

4. To give one's name or support to; to sanction; to aid by approval; to approve; as, to indorse an opinion.

To indorse in blank , to write one's name on the back of a note or bill, leaving a blank to be filled by the holder.

Indorsed adjective (Her.) See Addorsed .

Indorsee noun The person to whom a note or bill is indorsed, or assigned by indorsement.

Indorsement noun [ From Indorse ; confer Endorsement .] [ Written also endorsement .]


1. The act of writing on the back of a note, bill, or other written instrument.

2. That which is written on the back of a note, bill, or other paper, as a name, an order for, or a receipt of, payment, or the return of an officer, etc.; a writing, usually upon the back, but sometimes on the face, of a negotiable instrument, by which the property therein is assigned and transferred. Story. Byles. Burrill.

3. Sanction, support, or approval; as, the indorsement of a rumor, an opinion, a course, conduct.

Blank indorsement . See under Blank .

Indorser, Indorsor noun The person who indorses. [ Written also endorser .]

Indow transitive verb See Endow .

Indowment noun See Endowment .

Indoxyl noun [ Ind igo + hydroxyl .] (Chemistry) A nitrogenous substance, C 8 H 7 NO, isomeric with oxindol, obtained as an oily liquid.

Indoxylic adjective (Chemistry) Of or pertaining to, or producing, indoxyl; as, indoxylic acid.

Indraught noun
1. An opening from the sea into the land; an inlet. [ Obsolete] Sir W. Raleigh.

2. A draught of air or flow of water setting inward.

Indrawn adjective Drawn in.

Indrench transitive verb To overwhelm with water; to drench; to drown. [ Obsolete] Shak.

Indris, Indri noun (Zoology) Any lemurine animal of the genus Indris .

» Several species are known, all of them natives of Madagascar, as the diadem indris ( I. diadema ), which has a white ruff around the forehead; the woolly indris ( I. laniger ); and the short-tailed or black indris ( I. brevicaudatus ), which is black, varied with gray.

Indubious adjective [ Latin indubius . See In- not, and Dubious .]


1. Not dubious or doubtful; certain.

2. Not doubting; unsuspecting. " Indubious confidence." Harvey.

Indubitable adjective [ Latin indubitabilis : confer French indubitable . See In- not, and Dubitable .] Not dubitable or doubtful; too evident to admit of doubt; unquestionable; evident; apparently certain; as, an indubitable conclusion. -- noun That which is indubitable.

Syn. -- Unquestionable; evident; incontrovertible; incontestable; undeniable; irrefragable.

Indubitableness noun The state or quality of being indubitable.

Indubitably adverb Undoubtedly; unquestionably; in a manner to remove all doubt.

Oracles indubitably clear and infallibly certain.
Barrow.

Indubitate adjective [ Latin indubitatus ; prefix in- not + dubitatus , past participle of dubitare to doubt.] Not questioned or doubtful; evident; certain. [ Obsolete] Bacon.

Indubitate transitive verb [ Latin indubitatus , past participle of indubitare ; prefix in- in + dubitare to doubt.] To bring into doubt; to cause to be doubted. [ Obsolete]

To conceal, or indubitate , his exigency.
Sir T. Browne.

Induce transitive verb [ imperfect & past participle Induced ; present participle & verbal noun Inducing .] [ Latin inducere , inductum ; prefix in- in + ducere to lead. See Duke , and confer Induct .]


1. To lead in; to introduce. [ Obsolete]

The poet may be seen inducing his personages in the first Iliad.
Pope.

2. To draw on; to overspread. [ A Latinism] Cowper.

3. To lead on; to influence; to prevail on; to incite; to move by persuasion or influence. Shak.

He is not obliged by your offer to do it, . . . though he may be induced , persuaded, prevailed upon, tempted.
Paley.

Let not the covetous desire of growing rich induce you to ruin your reputation.
Dryden.

4. To bring on; to effect; to cause; as, a fever induced by fatigue or exposure.

Sour things induces a contraction in the nerves.
Bacon.

5. (Physics) To produce, or cause, by proximity without contact or transmission, as a particular electric or magnetic condition in a body, by the approach of another body in an opposite electric or magnetic state.

6. (Logic) To generalize or conclude as an inference from all the particulars; -- the opposite of deduce .

Syn. -- To move; instigate; urge; impel; incite; press; influence; actuate.

Induced current (Electricity) A current due to variation in the magnetic field surrounding its conductor.

Inducement noun [ From Induce .]


1. The act of inducing, or the state of being induced.

2. That which induces; a motive or consideration that leads one to action or induces one to act; as, reward is an inducement to toil. "Mark the inducement ." Shak.

3. (Law) Matter stated by way of explanatory preamble or introduction to the main allegations of a pleading; a leading to.

Syn. -- Motive; reason; influence. See Motive .

Inducer noun One who, or that which, induces or incites.

Inducible adjective
1. Capable of being induced, caused, or made to take place.

2. Obtainable by induction; derivable; inferable.

Induct transitive verb [ imperfect & past participle Inducted ; present participle & verbal noun Inducting .] [ Latin inductus , past participle of inducere . See Induce .]


1. To bring in; to introduce; to usher in.

The independent orator inducting himself without further ceremony into the pulpit.
Sir W. Scott.

2. To introduce, as to a benefice or office; to put in actual possession of the temporal rights of an ecclesiastical living, or of any other office, with the customary forms and ceremonies.

The prior, when inducted into that dignity, took an oath not to alienate any of their lands.
Bp. Burnet.

Inductance noun (Electricity) Capacity for induction; the coefficient of self- induction.

» The unit of inductance is the henry .

Inductance coil (Electricity) A choking coil.

Inducteous adjective (Electricity) Rendered electro-polar by induction, or brought into the opposite electrical state by the influence of inductive bodies.

Inductile adjective [ Prefix in- not + ductile : confer French inductile .] Not ductile; incapable of being drawn into threads, as a metal; inelastic; tough.

Inductility noun The quality or state of being inductile.

Induction noun [ Latin inductio : confer French induction . See Induct .]


1. The act or process of inducting or bringing in; introduction; entrance; beginning; commencement.

I know not you; nor am I well pleased to make this time, as the affair now stands, the induction of your acquaintance.
Beau. & Fl.

These promises are fair, the parties sure,
And our induction dull of prosperous hope.
Shak.

2. An introduction or introductory scene, as to a play; a preface; a prologue. [ Obsolete]

This is but an induction : I will draw
The curtains of the tragedy hereafter.
Massinger.

3. (Philos.) The act or process of reasoning from a part to a whole, from particulars to generals, or from the individual to the universal; also, the result or inference so reached.

Induction is an inference drawn from all the particulars.
Sir W. Hamilton.

Induction is the process by which we conclude that what is true of certain individuals of a class, is true of the whole class, or that what is true at certain times will be true in similar circumstances at all times.
J. S. Mill.

4. The introduction of a clergyman into a benefice, or of an official into a office, with appropriate acts or ceremonies; the giving actual possession of an ecclesiastical living or its temporalities.

5. (Math.) A process of demonstration in which a general truth is gathered from an examination of particular cases, one of which is known to be true, the examination being so conducted that each case is made to depend on the preceding one; -- called also successive induction .

6. (Physics) The property by which one body, having electrical or magnetic polarity, causes or induces it in another body without direct contact; an impress of electrical or magnetic force or condition from one body on another without actual contact.

Electro-dynamic induction , the action by which a variable or interrupted current of electricity excites another current in a neighboring conductor forming a closed circuit. -- Electro-magnetic induction , the influence by which an electric current produces magnetic polarity in certain bodies near or around which it passes. -- Electro-static induction , the action by which a body possessing a charge of statical electricity develops a charge of statical electricity of the opposite character in a neighboring body. -- Induction coil , an apparatus producing induced currents of great intensity. It consists of a coil or helix of stout insulated copper wire, surrounded by another coil of very fine insulated wire, in which a momentary current is induced, when a current (as from a voltaic battery), passing through the inner coil, is made, broken, or varied. The inner coil has within it a core of soft iron, and is connected at its terminals with a condenser; -- called also inductorium , and Ruhmkorff's coil . -- Induction pipe , port , or valve , a pipe, passageway, or valve, for leading or admitting a fluid to a receiver, as steam to an engine cylinder, or water to a pump. -- Magnetic induction , the action by which magnetic polarity is developed in a body susceptible to magnetic effects when brought under the influence of a magnet. -- Magneto-electric induction , the influence by which a magnet excites electric currents in closed circuits.

Logical induction , (Philos.) , an act or method of reasoning from all the parts separately to the whole which they constitute, or into which they may be united collectively; the operation of discovering and proving general propositions; the scientific method. -- Philosophical induction , the inference, or the act of inferring, that what has been observed or established in respect to a part, individual, or species, may, on the ground of analogy, be affirmed or received of the whole to which it belongs. This last is the inductive method of Bacon. It ascends from the parts to the whole, and forms, from the general analogy of nature, or special presumptions in the case, conclusions which have greater or less degrees of force, and which may be strengthened or weakened by subsequent experience and experiment. It relates to actual existences, as in physical science or the concerns of life. Logical induction is founded on the necessary laws of thought; philosophical induction , on the interpretation of the indications or analogy of nature.

Syn. -- Deduction. -- Induction , Deduction . In induction we observe a sufficient number of individual facts, and, on the ground of analogy, extend what is true of them to others of the same class, thus arriving at general principles or laws. This is the kind of reasoning in physical science. In deduction we begin with a general truth, which is already proven or provisionally assumed, and seek to connect it with some particular case by means of a middle term, or class of objects, known to be equally connected with both. Thus, we bring down the general into the particular, affirming of the latter the distinctive qualities of the former. This is the syllogistic method. By induction Franklin established the identity of lightning and electricity; by deduction he inferred that dwellings might be protected by lightning rods.

Induction generator A machine built as an induction motor and driven above synchronous speed, thus acting as an alternating-current generator; -- called also asynchronous generator . Below synchronism the machine takes in electrical energy and acts as an induction motor; at synchronism the power component of current becomes zero and changes sign, so that above synchronism the machine (driven for this purpose by mechanical power) gives out electrical energy as a generator.

Induction motor (Electricity) A type of alternating-current motor comprising two wound members, one stationary, called the stator , and the other rotating, called the rotor , these two members corresponding to a certain extent to the field and armature of a direct-current motor.

Inductional adjective Pertaining to, or proceeding by, induction; inductive.

Inductive adjective [ Late Latin inductivus : confer French inductif . See Induce .]


1. Leading or drawing; persuasive; tempting; -- usually followed by to .

A brutish vice,
Inductive mainly to the sin of Eve.
Milton.

2. Tending to induce or cause. [ R.]

They may be . . . inductive of credibility.
Sir M. Hale.

3. Leading to inferences; proceeding by, derived from, or using, induction; as, inductive reasoning.

4. (Physics) (a) Operating by induction; as, an inductive electrical machine. (b) Facilitating induction; susceptible of being acted upon by induction; as, certain substances have a great inductive capacity.

Inductive embarrassment (Physics) , the retardation in signaling on an electric wire, produced by lateral induction. -- Inductive philosophy or method . See Philosophical induction , under Induction . -- Inductive sciences , those sciences which admit of, and employ, the inductive method, as astronomy, botany, chemistry, etc.

Inductively adverb By induction or inference.

Inductometer noun [ Induct ion + -meter .] (Electricity) An instrument for measuring or ascertaining the degree or rate of electrical induction.

Inductor noun [ Latin , one who stirs up or rouses. See Induce .]


1. The person who inducts another into an office or benefice.

2. (Electricity) That portion of an electrical apparatus, in which is the inducing charge or current.

Inductorium noun ; plural English Inductoriums , Latin Inductoria . [ New Latin , from English induct ion.] (Electricity) An induction coil.

Inductric, Inductrical adjective (Electricity) Acting by, or in a state of, induction; relating to electrical induction.

Indue transitive verb [ imperfect & past participle Indued ; present participle & verbal noun Induing .] [ Written also endue .] [ Latin induere to put on, clothe, from OL. indu (fr. in- in) + a root seen also in Latin exuere to put off, divest, exuviae the skin of an animal, slough, induviae clothes. Confer Endue to invest.]


1. To put on, as clothes; to draw on.

The baron had indued a pair of jack boots.
Sir W. Scott.

2. To clothe; to invest; hence, to endow; to furnish; to supply with moral or mental qualities.

Indu'd with robes of various hue she flies.
Dryden.

Indued with intellectual sense and souls.
Shak.

Induement noun [ From Indue ; confer Indument , Enduement .] The act of induing, or state of being indued; investment; endowment. W. Montagu.

Indulge transitive verb [ imperfect & past participle Indulged ; present participle & verbal noun Indulging .] [ Latin indulgere to be kind or tender to one; confer OIr. dilgud , equiv. to Latin remissio , OIr. dligeth , equiv. to Latin lex , Goth. dulgs debt.]


1. To be complacent toward; to give way to; not to oppose or restrain ; (a) when said of a habit, desire, etc.: to give free course to; to give one's self up to; as, to indulge sloth, pride, selfishness, or inclinations; (b) when said of a person: to yield to the desire of; to gratify by compliance; to humor; to withhold restraint from; as, to indulge children in their caprices or willfulness; to indulge one's self with a rest or in pleasure.

Hope in another life implies that we indulge ourselves in the gratifications of this very sparingly.
Atterbury.

2. To grant as by favor; to bestow in concession, or in compliance with a wish or request.

Persuading us that something must be indulged to public manners.
Jer. Taylor.

Yet, yet a moment, one dim ray of light
Indulge , dread Chaos, and eternal Night!
Pope.

» It is remarked by Johnson, that if the matter of indulgence is a single thing, it has with before it; if it is a habit, it has in ; as, he indulged himself with a glass of wine or a new book; he indulges himself in idleness or intemperance. See Gratify .

Indulge intransitive verb To indulge one's self; to gratify one's tastes or desires; esp., to give one's self up (to); to practice a forbidden or questionable act without restraint; -- followed by in , but formerly, also, by to . "Willing to indulge in easy vices." Johnson.

Indulgement noun Indulgence. [ R.] Wood.