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/nat·u·ral/ (nach´ah-r'l) neither artificial nor pathologic.

family planning, natural

methods of preventing conception without the use of artificial contraceptive means. Also called fertility awareness methods. See also contraception.


Substance abuse A substance causing euphoria and analgesia at the desired abuse levels and physical dependence and CNS depression, stupor, coma and death in excess. See Opiates.
Narcotic types
Natural Products extracted from the poppy plant, yielding morphine and heroin, or the coca plant, yielding cocaine and crack
Semi-synthetic Products with opiate activity, eg meperidine and methadone or synthetics, see MPTP; under the umbrella term of narcotic, alkaloids, eg LSD, mescaline, barbiturates, alcohol, marijuana, cocaine, hallucinogens and stimulants, eg antidepressants.
Completely synthetic Products created by synthesis alone, eg fentanyl  


occurs in nature, without the intervention of humans.

natural experiments
occur by chance when all variables for a population are constant except one, which is different for one large part of the population compared with the other, e.g. when half of a flock comes from one climate and the other half is a local resident in another climate.
natural focus
the ecology that is best suited to a biological system, e.g. an individual insect-borne disease; the area in which the disease naturally flourishes best; an ecological niche.
natural history
history of a process or organism as it occurs in nature, e.g. course of a disease from infection to resolution.
natural killer (NK) cell
see natural killer cell.
natural selection
selection occurring in nature, without any human intervention, direct or indirect.
natural ventilation
ventilation without the use of artificially induced energy and the machines which it drives; the forces used are wind and the exchange of heat from within the barn and the external air, controlled by ventilation devices in the walls and the ceiling.

Patient discussion about natural

Q. What is the best natural cure for migraines? Every day I hear something else... would love it if you can share your experience...I'm sick of chemicals:)

A. stay off any products that have a any kind of a caffine content, including chocolate. try this for 3wks, ypu should notice a difference

Q. Is there a recommended natural cure for graves disease? I've been suffering from graves for a year now and really feel tired of it. I'm thinking of trying some natural medications cause the regular ones are dissapointing so far. Any experience with that??

A. I am not familiar with any natural supplements you can take for graves disease, furthermore, it is an illness where you should be on close monitoring of an endocrinologist, and have them tell you which medications you are allowed to take and what could make the situation worse. If regular treatment doesn't seem to help you much you should go for another check up to see how your thyroid is doing.

Q. Is there a natural cure for hpv?

More discussions about natural
References in periodicals archive ?
To test the influence of perceived naturalness on consumer preferences for produce from urban farms, we conducted an online survey in Spring 2016 that included 173 student participants.
While naturalness is often seen as a particularly central concept in the US (Cole and Yung 2010: 2), Sweden is also a case with a historically strong focus on naturalness, as the first country in Europe to establish national parks, consisting of supposedly pristine nature providing images of a mythic past and fostering a national identity (Mels 2002).
Since neither statistical normality nor non-pathological normality (as ideal normality or functional normality) do not offer satisfactory interpretations for what is meant by the unnaturalness of neuro-enhancement, one might suggest that naturalness and normality in this context refer to what is typical of healthy human beings (Sparrow 2010:117).
Many systems based on formant synthesis technology generate artificial, robotic-sounding However, maximum naturalness is not always the goal of a speech synthesis system, and hence formant synthesis systems have advantages over concatenative systems, where naturalness is not major concern.
The two basic kinds of presuppositions are naturalness scales and rules of alignment among corresponding values of any two scales.
Three years ago at the School of American Ballet's spring workshop, she had such a lovely naturalness and fluidity that I singled her out of tire crowd.
We can point to the annual cycle of decay and declare the naturalness of death in the midst of things for the sake of the new life to come.
Although adding transparency improved the naturalness of computer-generated black and dark-brown hair, blond hair still looked lifeless.
However, the subject was judged to speak at a slower rate with less effort, and with less naturalness posttreatment.
Apart from the unique timbre of his voice, there is a freshly scrubbed wholesomeness to his sound, a naturalness and ease in his delivery and a general joie de vivre that are missing in many others.
In addition to setting the scene, the surrounding greenery, blue sky, and balmy light can also be regarded as signs of the somewhat paradoxical naturalness of the men fraternizing and hooking up, caught--or about to be--in the calm eye of gathering hurricane AIDS.

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