| train | 1. To be drilled in military exercises; to do duty in a military company. 2. To prepare by exercise, diet, instruction, etc, for any physical contest; as, to train for a boat race. 1. That which draws along; especially, persuasion, artifice, or enticement; allurement. "Now to my charms, and to my wily trains." 2. Hence, something tied to a lure to entice a hawk; also, a trap for an animal; a snare. "With cunning trains him to entrap un wares." (Spenser) 3. That which is drawn along in the rear of, or after, something; that which is in the hinder part or rear. Specifically: That part of a gown which trails behind the wearer. The after part of a gun carriage; the trail. The tail of a bird. "The train steers their flights, and turns their bodies, like the rudder of ship." 4. A number of followers; a body of attendants; a retinue; a suite. "The king's daughter with a lovely train." (Addison) "My train are men of choice and rarest parts." (Shak) 5. A consecution or succession of connected things; a series. "A train of happy sentiments." "The train of ills our love would draw behind it." (Addison) "Rivers now Stream and perpetual draw their humid train." (Milton) "Other truths require a train of ideas placed in order." (Locke) 6. Regular method; process; course; order; as, things now in a train for settlement. "If things were once in this train, . . . Our duty would take root in our nature." (Swift) 7. The number of beats of a watch in any certain time. 8. A line of gunpowder laid to lead fire to a charge, mine, or the like. 9. A connected line of cars or carriages on a railroad. 10. A heavy, long sleigh used in Canada for the transportation of merchandise, wood, and the like. 11. A roll train; as, a 12-inch train. Roll train, or Train of rolls, a tackle for running guns in and out. Train, Cars. Train is the word universally used in England with reference to railroad traveling; as, I came in the morning train. In the United States, the phrase the cars has been extensively introduced in the room of train; as, the cars are late; I came in the cars. The English expression is obviously more appropriate, and is prevailing more and more among Americans, to the exclusion of the cars. Origin: F. Train, OF. Train, trahin; cf. (for some of the senses) F. Traine. See Train. 1. To draw along; to trail; to drag. "In hollow cube Training his devilish enginery." (Milton) 2. To draw by persuasion, artifice, or the like; to attract by stratagem; to entice; to allure. "If but a dozen French Were there in arms, they would be as a call To train ten thousand English to their side." (Shak) "O, train me not, sweet mermaid, with thy note." (Shak) "This feast, I'll gage my life, Is but a plot to train you to your ruin." (Ford) 3. To teach and form by practice; to educate; to exercise; to discipline; as, to train the militia to the manual exercise; to train soldiers to the use of arms. "Our trained bands, which are the trustiest and most proper strength of a free nation." (Milton) "The warrior horse here bred he's taught to train." (Dryden) 4. To break, tame, and accustom to draw, as oxen. 5. <botany> To lead or direct, and form to a wall or espalier; to form to a proper shape, by bending, lopping, or pruning; as, to train young trees. "He trained the young branches to the right hand or to the left." (Jeffrey) 6. <chemical> To trace, as a lode or any mineral appearance, to its head. To train a gun, to point it at some object either forward or else abaft the beam, that is, not directly on the side. To train, or To train up, to educate; to teach; to form by instruction or practice; to bring up. "Train up a child in the way he should go; and when he is old, he will not depart from it." (Prov. Xxii. 6) "The first Christians were, by great hardships, trained up for glory." (Tillotson) Origin: OF. Trahiner, trainer,F. Trainer, LL. Trahinare, trainare, fr. L. Trahere to draw. See Trail. Source: Websters Dictionary (01 Mar 1998) |
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| train-of-four stimulus | A method for measuring magnitude and type of neuromuscular blockade, based upon the ratio of the amplitude of the fourth evoked mechanical response to the first one, when four supramaximal 2-Hz electrical currents are applied for 2 seconds to a peripheral motor nerve. (05 Mar 2000) |
| atrial echo | Electrical reactivation of the atrium by a retrograde impulse returning from the A-V node while the antegrade impulse continues to the ventricle; characterised electrocardiographically, by a pair of P waves enclosing a QRS complex, the second P wave being inverted, indicating that it is the reverse (the retrograde pathway) of the pathway of the first P wave (the antegrade pathway). (05 Mar 2000) |
| spin echo | A commonly used technique to recover T2 relaxation signals in magnetic resonance imaging, by using a 180 |
| nodus sinuatrialis echo | A postectopic sinus beat occurring earlier than would be expected from the preceding sinus node discharge interval; i.e., the interval following a premature beat of supraventricular origin is less than the ordinary cycle length between sinus beats, whereas ordinarily the interval would be expected to exceed cycle length. (05 Mar 2000) |
| echo | Origin: L. Echo, Gr. Echo, sound, akin to, sound, noise; cf. Skr. Va to sound, bellow; perh. Akin to E. Voice: cf. F. Echo. 1. A sound reflected from an opposing surface and repeated to the ear of a listener; repercussion of sound; repetition of a sound. "The babbling echo mocks the hounds." (Shak) "The woods shall answer, and the echo ring." (Pope) 2. Sympathetic recognition; response; answer. "Fame is the echo of actions, resounding them." (Fuller) "Many kind, and sincere speeches found an echo in his heart." (R. L. Stevenson) 3. A wood or mountain nymph, regarded as repeating, and causing the reverberation of them. "Sweet Echo, sweetest nymph, that liv'st unseen Within thy airy shell." (Milton) A nymph, the daughter of Air and Earth, who, for love of Narcissus, pined away until nothing was left of her but her voice. "Compelled me to awake the courteous Echo To give me answer from her mossy couch." (Milton) Echo organ, a stop upon a harpsichord contrived for producing the soft effect of distant sound. To applaud to the echo, to give loud and continuous applause. "I would applaud thee to the very echo, That should applaud again." (Shak) Source: Websters Dictionary (01 Mar 1998) |
| echo beat | Extrasystole produced by the return of an impulse in the heart retrograde to a focus near its origin which then returns antegradely to produce a second depolorization. (05 Mar 2000) |
| echo-free | The property of appearing echo-free or without echoes on a sonographic image; a clear cyst appears anechoic. See: transonic. Synonym: echo-free. Origin: G. An-priv. + echo + ic (05 Mar 2000) |
| echo planar | A method of magnetic resonance imaging that allows rapid image acquisition during free induction decay, using technically difficult rapidly oscillating radiofrequency gradients. (05 Mar 2000) |
| echo-planar imaging | A type of magnetic resonance imaging that uses only one nuclear spin excitation per image and therefore can obtain images in a fraction of a second rather than the minutes required in traditional mri techniques. It is used in a variety of medical and scientific applications. (12 Dec 1998) |
| echo reaction | A disorder of speech where there is an involuntary repetition several times of the same word. (27 Sep 1997) |
| echo speech | A disorder of speech where there is an involuntary repetition several times of the same word. (27 Sep 1997) |
| alu sequence | Any of a family of short (300 basepairs long) repeated sequences that occur throughout the human genome. (09 Oct 1997) |
| amino acid sequence | The sequence of amino acids as arrayed in chains, sheets, etc., within the protein molecule. This is referred to as the primary structure of proteins. It is of fundamental importance in determining protein conformation. (12 Dec 1998) |
| autonomously replicating sequence | <molecular biology> This is a chromosomal sequence that allows plasmids to replicate on their own in yeast. (02 Jan 1998) |