(a.) Extinguished; put out; quenched; as, a fire, a light, or a lamp, is extinct; an extinct volcano.
(a.) Without a survivor; without force; dead; as, a family becomes extinct; an extinct feud or law.
(v. t.) To cause to be extinct.
Example Sentences:
(1) The stages of mourning involve cognitive learning of the reality of the loss; behaviours associated with mourning, such as searching, embody unlearning by extinction; finally, physiological concomitants of grief may influence unlearning by direct effects on neurotransmitters or neurohormones, such as cortisol, ACTH, or norepinephrine.
(2) The effect upon ethanol responding was found not to resemble a pattern of extinction, but rather was best described as a general overall reduction in responding.
(3) In a recent study, Orr and Lanzetta (1984) showed that the excitatory properties of fear facial expressions previously described (Lanzetta & Orr, 1981; Orr & Lanzetta, 1980) do not depend on associative mechanisms; even in the absence of reinforcement, fear faces intensify the emotional reaction to a previously conditioned stimulus and disrupt extinction of an acquired fear response.
(4) We conclude that the procedure used in this study is a non-intrusive intervention that is an extension of the current literature pertaining to sensory extinction.
(5) After 40 programmed minutes of acquisition and 12 min of maintenance, without notice, both schedules changed to extinction for 28 min.
(6) This differential absorbance is linear with increasing concentrations of Na2MoO4 and was used to calculate the molar extinction coefficient of molybdochelin at 425 nm (epsilon similar to 6,200).
(7) However, during massed testing, all subjects trained with response contingent CS termination showed an overall extinction influence, which was most pronounced in the medial subgroup, although the laterals showed frequency control as well.
(8) When reinforcement for competing behavior was withdrawn, however, rats resumed their original behavior and there were no overall savings in total responses to extinction.
(9) The relative amount of the crystals was measured in both amoeba strains on the basis of the integral extinction value.
(10) Chronic extinction of chain closed conditioned reflex in intact rabbits took five to six days.
(11) The amounts of phosphatidylcholine and sphingomyelin could be determined by high-performance liquid chromatography and ultraviolet absorption if the apparent extinction coefficient of the material analyzed was established.
(12) In a number of neurones the extinction of reflexes either does not change the reaction to acetylcholine, or enhances it.
(13) In Experiment 3, following an unsignaled reinforcement delay, groups receiving either no event or signaled food in the context responded faster in extinction than groups receiving no context exposure or unsignaled food.
(14) The optical extinction decreases as the red cell agglutinates grow, giving a parametric estimate of the haemagglutination rate.
(15) By calculating for DNA standard solutions the value of the ratio between the extinction at 665 nm after 15 min to the extinction of 600 nm after 2 min of the orcinol reaction it is possible to increase specifiaty of the orcinol method for determination of the RNA content.
(16) To lose the Sundarbans would be to move a step closer to the extinction of these majestic animals," said ZSL tiger expert Sarah Christie.
(17) Values obtained for thebuoyant density, isoelectric point, and extinction coefficient differed minimally; major differences were observed in the molecular weight and the characterisitc width of cylinders formed by in vitro-assembled T-layer of the wild-type and variant.
(18) The CS+ preference persisted for several weeks during extinction tests when both the CS+ and CS- were paired with IG water or with no infusions.
(19) The extinction coefficient at 550 nm for the oxidized enzyme is about 5300 (M subunit)-1 X cm-1.
(20) On this planet, extinction is the norm – of the 4 billion species ever thought to have evolved, 99% have become extinct.
Feeble
Definition:
(superl.) Deficient in physical strength; weak; infirm; debilitated.
(superl.) Wanting force, vigor, or efficiency in action or expression; not full, loud, bright, strong, rapid, etc.; faint; as, a feeble color; feeble motion.
(v. t.) To make feble; to enfeeble.
Example Sentences:
(1) Arsenal’s 10 men fall at the first hurdle against Dinamo Zagreb Read more This win, even against such feeble opponents, was celebrated, with the locals chorusing their manager’s name amid a wave of relief given so much of the team’s domestic campaign to date has been dismal.
(2) A Tory spokesman said: “This is feeble stuff from a party with no economic plan and a leader who just isn’t up it.
(3) The most important manometric abnormality was the feeble contractions of the pharyngeal musculature, more pronounced in patients with severe dysphagia (grade II).
(4) After Cameron wasted an overlap opportunity with a feeble cross into Elliot’s arms, Mark Hughes made an overdue substitution and sent on Peter Crouch.
(5) In Catalonia the outspoken local politician is derided as a feeble sellout for opposing total independence; in the rest of Spain he is damned as a rabid separatist for wanting a bit more self-governance.
(6) These data indicate that Veillonella and Neisseria species possess a feeble ability to attach to cleaned teeth.
(7) If you want to compare effective regulation with weak regulation, compare the utterly feeble 2009 PCC report into phone hacking with the way the former independent television regulator, the ITC, reacted when, back in 1998, the Guardian published allegations about a programme on drug-running made by Carlton TV.
(8) As good a way as any would have been to have followed the Twitter feed of one of his backbench MPs, Gloria De Piero, who was tweeting: “The government has a mandate to open Brexit negotiations but not a blank cheque that puts jobs, workers’ rights and our economy at risk.” Instead, he chose to go for a feeble joke.
(9) In treating vertebragenic headache, the segmental movement, the shortened postural muscles, the feeble phasic muscles and the wrong patterns of movement can be influenced by exercises.
(10) No proliferative activity is seen in the giant cells and these cells show only feeble phagocytic activity, tested by their ability to take up carbon particles.
(11) A muscle that has feeble tendon jerks may show a late component in the response to a tendon tap, with a latency similar to that of the long-latency stretch reflex.
(12) The administration of a convulsant dose of penicillin enhanced the transmission of monosynaptic reflexes in spinal cords in which reflex transmission was feeble before the drug treatment, but it had little effect in cords where monosynaptic reflexes were powerful to begin with.
(13) Facebook Twitter Pinterest Boris Johnson: ‘Saudi Arabia and Iran puppeteering in Middle East’ – video It’s true, the Saudis are propping up Yemen’s feeble half-government against a rebellion by Iranian-backed tribal militias.
(14) At the other extreme with an average allograft survival time of 91 days, C3H(H-1(a)) --> C3H.K(H-1(b)) showed a feeble production of plaque-forming cells with a peak response of 3.7 per 10 x 10(6) viable spleen cells at 9 days.
(15) But this much is clear: the old system of regulation was feeble.
(16) We have espoused unpopular causes, stood up for those too feeble to stand up for themselves, locked horns with the high and mighty so swollen with power that they have forgotten their roots, exposed corruption and the waste of your hard-earned tax rupees, and made sure that whatever the propaganda of the day, you were allowed to hear a contrary view.
(17) Of the several esophageal body motor abnormalities considered, only feeble peristalsis had significantly more positive Bernstein tests than did normal esophageal body motor functioning.
(18) Failures picked over include parliament's dithering over election laws that could result in the country going into a crucial presidential poll next year with no legal framework, the feeble sentences handed to the masterminds of the $900m Kabul Bank scandal and slow progress on asset recovery.
(19) For mild cooling (32 degrees C), the Q10 in 18-day-old embryos was about 1.5, while 12- and 16-day-old embryos had a Q10 value of about 2, indicating that a feeble homeothermic metabolic response to cooling appears in late prenatal embryos.
(20) "The justifications presented [for] the reduction are, to say the least, feeble.