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adjective artless, authentic, characteristic, connate, consistent, crude, free from affectation, genuine, inborn, inbred, indigenous, ingenerate, ingrained, innate, innatus, instinctive, instinctual, lifelike, native, nativus, normal, organic, original, pure, real, regular, true to life, typical, unadulterated, unartificial, uncultivated, unsynthetic, untouched
Associated concepts: natural law
See also: bodily, born, common, conventional, current, customary, familiar, genuine, habitual, informal, ingenuous, inherent, innate, legitimate, naive, native, normal, organic, physical, prevailing, real, realistic, regular, simple, sincere, spontaneous, unaffected, undistorted, unobtrusive, unpretentious, usual, veridical

SERVITUDES, NATURAL, civil law. Those servitudes which arise in consequence of the nature of the soil.
     2. By law the inferior heritages, are submitted in relation to the natural flow of waters, and the like, to the superior. An inferior field is, therefore, subject to the injury or prejudice which the situation of the ground, in its natural state, way cause it.

References in periodicals archive ?
Differences in birth weight associated with the 2008 Beijing Olympic air pollution reduction: results from a natural experiment.
But the same natural experiment may fail in a country with a
2) In his paper he evaluates the quality of the natural experiments in terms of the plausibility of the "as-if" randomization assumption.
In Darwin's case, his interpretation of what happens to finches when they are isolated from each other on different islands of the Galapagos, is one of the best known natural experiments in all of science.
The results of simulations obtained using numerical finite element models match the findings of natural experiments.
Hence, the incidence of natural experiments arising from exogenous shocks influences the value of intentional experiments.
Originally, we had in mind to consider only randomised or natural experiments and quasi-experiments where important intervening variables had been controlled for that went beyond what one usually finds in criminal records (such as number and kind of previous convictions and offences, plus age and gender); in particular, we thought that a certain number of studies might have considered also education, employment record and drug or alcohol abuse history.
Instead, quasi-experiments and natural experiments can be used to test ICT products.
Seven were randomized controlled trials (RCTs) and 10 controlled clinical trials (CCTs) or natural experiments.

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