(a.) Belonging to the essence, or that which makes an object, or class of objects, what it is.
(a.) Hence, really existing; existent.
(a.) Important in the highest degree; indispensable to the attainment of an object; indispensably necessary.
(a.) Containing the essence or characteristic portion of a substance, as of a plant; highly rectified; pure; hence, unmixed; as, an essential oil.
(a.) Necessary; indispensable; -- said of those tones which constitute a chord, in distinction from ornamental or passing tones.
(a.) Idiopathic; independent of other diseases.
Example Sentences:
(1) However, medicines have an important part to play, and it is now generally agreed that for the very poor populations medicines should be restricted to those on an 'essential drugs list' and should be made available as cheaply as possible.
(2) The results of the evaluation confirm that most problems seen by first level medical personnel in developing countries are simple, repetitive, and treatable at home or by a paramedical worker with a few safe, essential drugs, thus avoiding unnecessary visits to a doctor.
(3) Nucleotide, which is essential for catalysis, greatly enhances the binding of IpOHA by the reductoisomerase, with NADPH (normally present during the enzyme's rearrangement step, i.e., conversion of a beta-keto acid into an alpha-keto acid, in either the forward or reverse physiological reactions) being more effective than NADP.
(4) Community involvement is a key element of the Primary Health Care (PHC) approach, and thus an essential topic on a course for managers of Primary Health Care programmes.
(5) No significant fatty acid binding by proteins was detected in S. cerevisiae, even when grown on a fatty acid-rich medium, thus indicating that such proteins are not essential to fatty acid metabolism.
(6) The UK's standard position on ICC indictees is to avoid all contact unless "essential".
(7) In spite of important differences in size, chemical composition, polymer density, and configuration, biological macromolecules indeed manifest some of the essential physical-chemical properties of gels.
(8) Most cis AB sera have anti-B activity, essentially at 4 degrees C. In saliva A and H substances are found in normal amounts but B substance is only evidenced by inhibition of autologous cells agglutination.
(9) Treatment with trypsin gave essentially one radioactive peptide, the active site peptide, of approximately 2300 molecular weight.
(10) We conclude that this enzyme is essentially identical to the native enzyme and should be very useful in the future study of this important hydroxylase.
(11) Thus serum ionized calcium in untreated essential hypertensive patients may predict the blood pressure response to the slow calcium channel blocker verapamil.
(12) The effects of supervised mild aerobic exercise at the work load of the blood lactate threshold for 10 weeks on serum lipids and apolipoproteins were studied in 24 patients with essential hypertension.
(13) No other essential regulatory sequence is located further upstream.
(14) Based on the results of the Community AIM Exploratory Action, further collaborative work is required at EEC level to create an Integrated Health Information Environment (IHE) allowing essentially for integration, modularity and security.
(15) Ovarian vein sampling for androgen was essential in locating this patient's microscopic tumor.
(16) After approximately 20 in vitro passages, Chinese hamster kidney (CHK) cell cultures transformed upon exposure to different strains of SV 40 can show a diploid modal chromosome number of 22 with chromosome counts exclusively or essentially in the diploid range (20-25).
(17) An official from Cafcass, the children and family court advisory service, tried to persuade the child in several interviews, but eventually the official told the court that further persuasion was inappropriate and essentially abusive.
(18) Of 55 new open reading frames analysed by gene disruption, three are essential genes; of 42 non-essential genes that were tested, 14 show some discernible effect on phenotype and the remaining 28 have no overt function.
(19) Essential characteristics of the composite bone cement included a homogeneous and uniform fiber distribution, and a minimal increase in apparent viscosity of the polymerizing cement.
(20) The median blood levels were lower in hyperacidic subjects and higher in hypoacidic patients; the urinary excretion of the digitalis compound showed no essential differences.
Expendable
Definition:
Example Sentences:
(1) In the present study, respirometric quotients, the ratio of oral air volume expended to total volume expended, were obtained using separate but simultaneous productions of oral and nasal airflow.
(2) The increase in membrane resistance at low pH allowed S. bovis to maintain its membrane potential and expend less energy when its ability to ferment glucose was impaired.
(3) Approximately 76.5 percent of the funds was expended for treatment services, 12.6 percent for prevention services, and 10.9 percent for other services (for example, administration, research, training).
(4) Total hydraulic power expended per unit of forward flow was computed as an index of right ventricular-pulmonary artery coupling.
(5) Intuitively, weight lost should be determined by the difference between the total energy consumed and the total energy expended.
(6) We conclude that a greater effort should be expended to encourage and even direct patients toward this form of therapy.
(7) However, the shadow foreign secretary, Douglas Alexander , is adamant Labour could not afford to spend the first two years of government wrestling with a referendum on Europe, pointing to the energy it had expended on the near-disastrous no campaign for the Scotland independence vote.
(8) Both required regions are near the carboxyl terminus, and they are separated by a region which is expendable for binding (K. W. Ryan and A. Portner, 1990, Virology 174, 515-521).
(9) The full duplex of tetramer d(G4).d(C4) was prepared by expending about a month.
(10) There's no doubt that MacMaster expended an enormous amount of effort compiling the blog and creating Gay Girl's persona: poems, long imaginary reminiscences – even warning readers to treat some other websites "with a very large grain of salt" – but to what purpose?
(11) The FSB expends enormous effort on keeping track of its targets.
(12) For a club of such means, with fortunes expended already, the focus on Carlos Tevez alone in attack should be troubling.
(13) Portions of the carbon of methane expended for synthesis of the biomass, carbon dioxide, and exometabolites was different among methanotrophic cultures belonging to different genera.
(14) The percentage of individuals expending 2000 kcal or more per week in LTPA was significantly lower in black men than white men (25 vs. 35%; p = .01) but was not different in black versus white women (18 vs. 17%).
(15) "When it became clear that they wouldn't help themselves, Nick wasn't going to expend political capital defending them.
(16) This scheme not only maximizes the size of the coated vesicle generated, but also minimizes the number of transformations, thus minimizing the energy expended.
(17) It has stoked an existing paranoia that the lives of ordinary Africans are expendable.
(18) But on the strength of the effort expended on the right royal cover-up thus far, it seems a fair guess that officials and ministers will have given the prince’s letters rather more favourable attention than routine correspondence with a member of the public.
(19) This is probably because the grafted cell clone, reactive to mouse antigens, is small and has to be expended in order to be effective.
(20) Effects of levels-of-processing on retention of visually presented target and nontarget letter words were studied in relation to the amount of processing resources expended on the attended task.