(n.) A rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied; -- used for transmitting and modifying force and motion. Specif., a bar of metal, wood, or other rigid substance, used to exert a pressure, or sustain a weight, at one point of its length, by receiving a force or power at a second, and turning at a third on a fixed point called a fulcrum. It is usually named as the first of the six mechanical powers, and is of three kinds, according as either the fulcrum F, the weight W, or the power P, respectively, is situated between the other two, as in the figures.
(n.) A bar, as a capstan bar, applied to a rotatory piece to turn it.
(n.) An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.
Example Sentences:
(1) In this experiment animals were trained to lever press in two distinctive contexts.
(2) Orientation and lever responding were not functionally related.
(3) In older stages, the cervical joints rotate according to geometric and lever arm principles.
(4) In EastEnders , the mystery surrounding the identity of Kat's secret squeeze continues amid the grinding of narrative levers and the death rattle of overflogged script-horses.
(5) Cats were trained to press a lever for 0.5--1.0 ml of milk reward both in the presence and absence of ambient light.
(6) Setting out how Britain would have a lever over the rest of the EU to demand repatriation of UK competences, Cameron said: "What's happening in Europe right now is massive change being driven by the existence of the euro.
(7) When lever pressing was established, the 2-kHz signal was presented through a speaker adjacent to the response lever according to a different set of variable intertrial intervals.
(8) Officials said the changes to the planning rules will mean it is possible to lever in billions of private sector development in low-cost housing.
(9) Rats were allowed to bar press on either of two levers (left and right).
(10) Knee flexion is synchronized with ankle dorsiflexion by a synchronizer rod and lever.
(11) In order to study the interactions between serotonergic mechanism and electrical stimulation of the mesencephalic central gray substance, rats were trained to lever-press for terminating aversive electric stimuli applied at the Periaqueductal gray and adjoining tectum of the mesencephalon.
(12) Rats were trained to press a lever to obtain a brief burst of pulses to the lateral hypothalamus.
(13) But its original meaning is the practice of using the levers of the state and of government to get difficult things done that otherwise wouldn't happen.
(14) Intact rats and rats bearing lesions of the suprachiasmatic nuclei (SCNX rats) were trained to obtain food by pressing either of two levers located on opposite sides of a cylindrical cage.
(15) We found that attenuation of lever-pressing and water intake by raclopride were not more separated in dose than after, for example, haloperidol.
(16) Young rats weaned at 16 days were taught to press a lever by shaping at 18 days and trained for 11 days (from 20 to 30 days of age) on a fixed-interval 60-sec schedule, at a rate of 5 half-hour sessions per day.
(17) In contrast, the selective norepinephrine uptake inhibitors, desipramine and talsupram, and the selective serotonin uptake inhibitor, citalopram, occasioned averages of only 13 to 19% drug-lever responding.
(18) When reinforcement was not available, each lever response produced a 0.5-sec green light on the key.
(19) Rats implanted with placebo pellets and given access to morphine reestablished lever pressing, while those given access to isotonic saline extinguished their lever pressing.
(20) Levels of acetylcholine were significantly elevated in the telencephalon and diencephalon + mesencephalon of rats killed by near-freezing during conditioned suppression of food-reinforced lever pressing, whereas levels of serotonin, dopamine, and norepinephrine were not altered.
Stalk
Definition:
(n.) The stem or main axis of a plant; as, a stalk of wheat, rye, or oats; the stalks of maize or hemp.
(n.) The petiole, pedicel, or peduncle, of a plant.
(n.) That which resembes the stalk of a plant, as the stem of a quill.
(n.) An ornament in the Corinthian capital resembling the stalk of a plant, from which the volutes and helices spring.
(n.) One of the two upright pieces of a ladder.
(n.) A stem or peduncle, as of certain barnacles and crinoids.
(n.) The narrow basal portion of the abdomen of a hymenopterous insect.
(n.) The peduncle of the eyes of decapod crustaceans.
(n.) An iron bar with projections inserted in a core to strengthen it; a core arbor.
(v. i.) To walk slowly and cautiously; to walk in a stealthy, noiseless manner; -- sometimes used with a reflexive pronoun.
(v. i.) To walk behind something as a screen, for the purpose of approaching game; to proceed under clover.
(v. i.) To walk with high and proud steps; usually implying the affectation of dignity, and indicating dislike. The word is used, however, especially by the poets, to express dignity of step.
(v. t.) To approach under cover of a screen, or by stealth, for the purpose of killing, as game.
(n.) A high, proud, stately step or walk.
Example Sentences:
(1) Regeneration and reorganization of the proximal cut end of the pituitary stalk is demonstrated in Ompok bimaculatus with the aid of in situ staining technique.
(2) Thus, the long stalks of Sk1 or phosphate-starved caulobacters are not merely a function of their longer doubling times.
(3) The mesenchyme surrounding the stalk stains positively for fibronectin.
(4) Do know how much stalking is too much stalking Seven pages into Google is too much.
(5) A rich network of fibers was observed in the median eminence coursing towards the pituitary stalk.
(6) ECF1 is separated from the membrane-embedded F0 by a narrow stalk approximately 40 A long and approximately 25-30 A thick.
(7) Hormone secretion was increased by electrical stimulation of the pituitary stalk at different frequencies.
(8) Furthermore, there were differences between anterior and posterior regions of both slime sheaths and stalk tubes.
(9) Five minutes from time a fat red shirt stalked past making the tosser sign and, for emphasis, yelling: "Fucking wankers!"
(10) Septal release slightly decreased during pituitary stalk stimulation, whereas it did increase during stimulation of the supraoptic region.
(11) It is hemispherical in shape and is located at the end of a 1.5 mm long eye stalk.
(12) Since such rats supposedly have a normal pigment distribution and a normal pattern of decussation at the optic chiasm, this finding appears to undermine the suggested role played by stalk melanin in establishing the laterality of retinal fibre projections in other mammalian species.
(13) As culmination proceeds, pstA cells transform into pstB cells by activating the ecmB gene as they enter the stalk tube.
(14) Other steps, such as the introduction of a national stalking helpline and national revenge pornography helpline have assisted victims.
(15) And we know once they leave, men will follow and stalk them.
(16) The ultrastructure of some aggregating microorganisms, including fungal hyphae and sheath-forming and stalked bacteria, was studied in detail, and several modes of aggregation were suggested.
(17) George, a loner who was said to have stalked and photographed hundreds of women, always maintained his innocence.
(18) • One in 10 women have been stalked by a previous partner.
(19) Police investigating the Virginia Polytechnic Institute and State University massacre, which left 33 dead, mainly students, blamed Cho, a fourth-year English student who lived on the campus, for earlier incidents ranging from stalking women to setting fire to a dormitory.
(20) The editor of the Spectator stalks the corridors reminding all and sundry that the national debt will have risen far faster and higher under Cameron than under Labour in 13 years.