(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(8) When reinforcement for competing behavior was withdrawn, however, rats resumed their original behavior and there were no overall savings in total responses to extinction.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.
Fossil
Definition:
(a.) Dug out of the earth; as, fossil coal; fossil salt.
(a.) Like or pertaining to fossils; contained in rocks, whether petrified or not; as, fossil plants, shells.
(n.) A substance dug from the earth.
(n.) The remains of an animal or plant found in stratified rocks. Most fossils belong to extinct species, but many of the later ones belong to species still living.
(n.) A person whose views and opinions are extremely antiquated; one whose sympathies are with a former time rather than with the present.
Example Sentences:
(1) Photograph: AP Reasons for wavering • State relies on coal-fired electricity • Poor prospects for wind power • Conservative Democrat • Represents conservative district in conservative state and was elected on narrow margins Campaign support from fossil fuel interests in 2008 • $93,743 G K Butterfield (North Carolina) GK Butterfield, North Carolina.
(2) Biomass and crops for animals are as damaging as [burning] fossil fuels.” The recommendation follows advice last year that a vegetarian diet was better for the planet from Lord Nicholas Stern , former adviser to the Labour government on the economics of climate change.
(3) Bobbing in warming waters, this ancient ice fossil will be gone in a couple of weeks.
(4) The pendulum swung even further with growing fossil, archaeological and genetic data in the 1990s.
(5) This is triggered not so much by climate change but the cause of global warming itself: the burning of fossil fuels both inside and outside the home, says Farrar.
(6) This approximately 40-Myr-old specimen is the first fossil primate found in Burma since the fragmentary remains of the controversial earliest anthropoids Pondaungia cotteri Pilgrim and Amphipithecus mogaungensis Colbert were recovered more than 50 yr ago.
(7) Comparison of these tracks and the Hadar hominid foot fossils by Tuttle has led him to conclude that Australopithecus afarensis did not make the Tanzanian prints and that a more derived form of hominid is therefore indicated at Laetoli.
(8) Because the fossil fuel industry faces a closing pincers.
(9) The reputations of companies linked to fossil fuels are at immediate risk from a fast-growing divestment campaign, one of Europe’s biggest asset managers has warned.
(10) The first report, released last September in Stockholm , found humans were the "dominant cause" of climate change, and warned that much of the world's fossil fuel reserves would have to stay in the ground to avoid catastrophic climate change.
(11) The methods described make possible the preparation of fossil samples for light nad transmission electron microscopy.
(12) This would force them to move rapidly away from fossil fuels in just a few years, something which they say is impossible to do given their limited finances and need to improve the lives of their people.
(13) That means eliminating fossil fuel subsidies as well.
(14) The branching pattern derived from the DNA comparisons is congruent with the fossil evidence and supported by comparative biochemical, chromosomal, and morphological studies.
(15) This method ensures the good preservation of spatial relations between bone elements essential for studies of fossil bones, which are sometimes very brittle.
(16) Driven by a desire to reduce dependence on imported fossil fuels and promote a secure supply of energy, the government of Albania has been very eager to encourage increased investment in renewable energy and in 2013 a law was passed to promote renewable energy .
(17) What the Chinese want is resources, especially fossil fuels.
(18) Each country can discover how much CO2 it emits by calculating the volume of fossil fuels it burns, usually through imports and the tax system.
(19) Plus, unlike planet-screwing fossil fuels, solar could actually be subsidy-free in a few years.
(20) ('76), viz., that the fossil is "unique" among Hominoids, is essentially correct.