Webster's Dictionary, 1913

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Experimentarian adjective Relying on experiment or experience. "an experimentarian philosopher." Boyle. -- noun One who relies on experiment or experience. [ Obsolete]

Experimentation noun The act of experimenting; practice by experiment. J. S. Mill.

Experimentative adjective Experimental; of the nature of experiment. [ R.]

Experimentator noun [ Late Latin ] An experimenter. [ R.]

Experimenter noun One who makes experiments; one skilled in experiments. Faraday.

Experimentist noun An experimenter.

Experrection noun [ Latin expergisci , past participle experrectus , to rouse up; ex out + pergere to wake up.] A waking up or arousing. [ Obsolete] Holland

Expert adjective [ French expert , Latin expertus , past participle of experiri to try. See Experience .] Taught by use, practice, or experience, experienced; having facility of operation or performance from practice; knowing and ready from much practice; clever; skillful; as, an expert surgeon; expert in chess or archery.

A valiant and most expert gentleman.
Shak.

What practice, howsoe'er expert
In fitting aptest words to things . . .
Hath power to give thee as thou wert?
Tennyson.

Syn. -- Adroit; dexterous; clever; ready; prompt.

Expert noun
1. An expert or experienced person; one instructed by experience; one who has skill, experience, or extensive knowledge in his calling or in any special branch of learning.

2. (Law) (a) A specialist in a particular profession or department of science requiring for its mastery peculiar culture and erudition.

» Such specialists may be witnesses in matters as to which ordinary observers could not without such aid form just conclusions, and are liable for negligence in case they injure another from want of proper qualifications or proper care in the exercise of their specialty.

(b) A sworn appraiser.

Expert transitive verb To experience. [ Obsolete]

Die would we daily, once it to expert .
Spencer.

Expertly adverb In a skillful or dexterous manner; adroitly; with readiness and accuracy.

Expertness noun Skill derived from practice; readiness; as, expertness in seamanship, or in reasoning.

Syn. -- Facility; readiness; dexterity; adroitness; skill. See Facility .

Expetible adjective [ Latin , expetibilis , from expetere to wish for; ex out + petere to seek.] Worthy of being wished for; desirable. [ Obsolete] Puller.

Expiable adjective [ See Expiate .] Capable of being expiated or atoned for; as, an expiable offense; expiable guilt. Bp. Hall.

Expiate transitive verb [ imperfect & past participle Expiated; present participle & verbal noun Expiating.] [ Latin expiatus , past participle of expiare to expiate; ex out + piare to seek to appease, to purify with sacred rites, from pius pious. See Pious .]
1. To extinguish the guilt of by sufferance of penalty or some equivalent; to make complete satisfaction for; to atone for; to make amends for; to make expiation for; as, to expiate a crime, a guilt, or sin.

To expiate his treason, hath naught left.
Milton.

The Treasurer obliged himself to expiate the injury.
Clarendon.

2. To purify with sacred rites. [ Obsolete]

Neither let there be found among you any one that shall expiate his son or daughter, making them to pass through the fire.
Deut. xviii. 10 (Douay version)

Expiate adjective [ Latin expiatus ,p. p] Terminated. [ Obsolete] Shak.

Expiation noun [ Latin expiatio : confer French expiation ]
1. The act of making satisfaction or atonement for any crime or fault; the extinguishing of guilt by suffering or penalty.

His liberality seemed to have something in it of self- abasement and expiation .
W. Irving.

2. The means by which reparation or atonement for crimes or sins is made; an expiatory sacrifice or offering; an atonement.

Those shadowy expiations weak,
The blood of bulls and goats.
Milton.

3. An act by which the threats of prodigies were averted among the ancient heathen. [ Obsolete] Hayward.

Expiatist noun An expiator. [ R.]

Expiator noun [ Latin ] One who makes expiation or atonement.

Expiatorious adjective Of an expiatory nature; expiatory. Jer. Taylor.

Expiatory adjective [ Latin expiatorius : confer French expiatoire .] Having power, or intended, to make expiation; atoning; as, an expiatory sacrifice.

Expilation noun [ Latin expiatio .] The act of expilating or stripping off; plunder; pillage. [ Obsolete]

This ravenous expilation of the state.
Daniel.

Expilator noun [ Latin ] One who pillages; a plunderer; a pillager. [ Obsolete] Sir T. Browne.

Expirable adjective That may expire; capable of being brought to an end.

Expirant noun One who expires or is expiring.

Expiration noun [ Latin expiratio , exspiratio : confer French expiration . See Expire .]
1. The act of expiring ; as: (a) (Physiol.) The act or process of breathing out, or forcing air from the lungs through the nose or mouth; as, respiration consists of inspiration and expiration ; -- opposed to inspiration . (b) Emission of volatile matter; exhalation.

The true cause of cold is an expiration from the globe of the earth.
Bacon.

(c) The last emission of breath; death. "The groan of expiration ." Rambler.

(d) A coming to a close; cessation; extinction; termination; end.

Before the expiration of thy time.
Shak.

2. That which is expired; matter breathed forth; that which is produced by breathing out, as a sound.

The aspirate "he," which is . . . a gentle expiration .
G. Sharp.

Expiratory adjective (Physiol.) Pertaining to, or employed in, the expiration or emission of air from the lungs; as, the expiratory muscles.

Expire transitive verb [ imperfect & past participle Expired ; p. pr & verbal noun Expiring .] [ Latin expirare , exspirare , expiratum , exspiratum ; ex out + spirare to breathe: confer French expirer . See Spirit .]
1. To breathe out; to emit from the lungs; to throw out from the mouth or nostrils in the process of respiration; - - opposed to inspire .

Anatomy exhibits the lungs in a continual motion of inspiring and expiring air.
Harvey.

This chafed the boar; his nostrils flames expire .
Dryden.

2. To give forth insensibly or gently, as a fluid or vapor; to emit in minute particles; to exhale; as, the earth expires a damp vapor; plants expire odors.

The expiring of cold out of the inward parts of the earth in winter.
Bacon.

3. To emit; to give out. [ Obsolete] Dryden.

4. To bring to a close; to terminate. [ Obsolete]

Expire the term
Of a despised life.
Shak.

Expire intransitive verb
1. To emit the breath.

2. To emit the last breath; to breathe out the life; to die; as, to expire calmly; to expire in agony.

3. To come to an end; to cease; to terminate; to perish; to become extinct; as, the flame expired ; his lease expires to-day; the month expired on Saturday.

4. To burst forth; to fly out with a blast. [ Obsolete] "The ponderous ball expires ." Dryden.

Expiring adjective
1. Breathing out air from the lungs; emitting fluid or volatile matter; exhaling; breathing the last breath; dying; ending; terminating.

2. Pertaining to, or uttered at, the time of dying; as, expiring words; expiring groans.

Expiry noun Expiration.

He had to leave at the expiry of the term.
Lamb.

The Parliament . . . now approaching the expiry of its legal term.
J. Morley.

Expiscate transitive verb [ Latin expiscatus , past participle of expiscari to fish out; ex out+ piscari to fish, piscis fish.] To fish out; to find out by skill or laborious investigation; to search out. "To expiscate principles." [ R.] Nichol.

Dr. Burton has with much ingenuity endeavored to expiscate the truth which may be involved in them.
W. Latin Alexander.

Expiscation noun The act of expiscating; a fishing. [ R.] Chapman.

Expiscatory adjective Tending to fish out; searching out [ R.] Carlyle.

Explain (ĕks*plān") transitive verb [ imperfect & past participle Explained (- plānd"); present participle & verbal noun Explaining .] [ Latin explandare to flatten, spread out, explain; ex out + plandare to make level or plain, planus plain: confer Old French esplaner , explaner . See Plain , adjective , and confer Esplanade .]
1. To flatten; to spread out; to unfold; to expand. [ Obsolete]

The horse-chestnut is . . . ready to explain its leaf.
Evelyn.

2. To make plain, manifest, or intelligible; to clear of obscurity; to expound; to unfold and illustrate the meaning of; as, to explain a chapter of the Bible.

Commentators to explain the difficult passages to you.
Gay.

To explain away , to get rid of by explanation. "Those explain the meaning quite away ." Pope.

Syn. -- To expound; interpret; elucidate; clear up.

Explain intransitive verb To give an explanation.

Explainable adjective [ Latin explainabilis .] Capable of being explained or made plain to the understanding; capable of being interpreted. Sir. T. Browne.

Explainer noun One who explains; an expounder or expositor; a commentator; an interpreter.

Explanate adjective [ Latin explanatus , past participle of explanare . See Explain .] (Bot. & Zoology) Spreading or extending outwardly in a flat form.

Explanation noun [ Latin explanatio : confer Old French esplanation .]
1. The act of explaining, expounding, or interpreting; the act of clearing from obscurity and making intelligible; as, the explanation of a passage in Scripture, or of a contract or treaty.

2. That which explains or makes clear; as, a satisfactory explanation .

3. The meaning attributed to anything by one who explains it; definition; interpretation; sense.

Different explanations [ of the Trinity].
Bp. Burnet.

4. A mutual exposition of terms, meaning, or motives, with a view to adjust a misunderstanding, and reconcile differences; reconciliation; agreement; as, to come to an explanation .

Syn. -- Definition; description; explication; exposition; interpretation; detail. See Definition .

Explanative adjective Explanatory.

Explanatoriness noun The quality of being explanatory.

Explanatory adjective [ Latin explanatorius .] Serving to explain; containing explanation; as explanatory notes. Swift.

Explat, Explate transitive verb [ Prefix ex- + plat or plait .] To explain; to unfold. [ Obsolete]

Like Solon's self explatest the knotty laws.
B. Jonson.

Expletion noun [ Latin expletio a satisfying. See Expletive .] Accomplishment; fulfillment. [ Obsolete] Killingbeck.

Expletive adjective [ Latin expletivus , from expletus , past participle of explere to fill up; ex out+ plere to fill, akin to plenus full: confer French explétif . See Full .] Filling up; hence, added merely for the purpose of filling up; superfluous. " Expletive imagery." Hallam.

Expletive phrases to plump his speech.
Barrow.

Expletive noun A word, letter, or syllable not necessary to the sense, but inserted to fill a vacancy; an oath.

While explectives their feeble aid to join,
And ten low words oft creep in one dull line.
Pope.

Expletively adverb In the manner of an expletive.

Expletory adjective Serving to fill up; expletive; superfluous; as, an expletory word. Bp. Burnet.

Explicable adjective [ Latin explicabilis : confer French explicable .] Capable of being explicated; that may be explained or accounted for; admitting explanation.

It is not explicable upon any grounds.
Burke.