from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Based on or pertaining to scientific observation.
  • adj. Pertaining to observation in general.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to observation; consisting of, or containing, observations.

from The Century Dictionary and Cyclopedia

  • Of, pertaining to, or used in observation, especially in observation without experimentation.
  • Derived from or founded on observation: in this sense usually opposed to experimental.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. relying on observation or experiment


from Wiktionary, Creative Commons Attribution/Share-Alike License

From observation + -al.


  • He still needs some training in observational skills and could benefit from courses in brevity but that comes with the acceptance into the order.

    Page 2

  • Resolution is an important concept in observational astronomy.

    Archive 2009-02-25

  • Important goals for future work include the need to understand the relation of climate at the state and regional level to the patterns of global climate and to reverse the decline in observational networks that are so critical to accurate climate monitoring and prediction.

    About: Blinded by Science

  • The U.S. Food and Drug Administration today announced it has begun a safety review of the diabetes drug Actos (pioglitazone), after receiving preliminary results from a long-term observational study designed to evaluate the risk of bladder cancer associated with use of this drug.

    FDA investigates diabetes drug's safety

  • Using simulations of 20th century climate performed with 13 numerical models, we demonstrate that the apparent discrepancy between modeled and observed variability is largely explained by accounting for changes in observational coverage and instrumentation and by including the effects of volcanic eruptions.

    Balloon Juice » 2007 » June

  • Doctors were reassured by long-term observational studies that showed women who took estrogen after menopause were less likely to have heart disease.

    A Win, Win for Women?

  • And the Iboga Therapy House near Vancouver is now conducting a long-term observational study to examine changes in substance use in 20 consecutive individuals undergoing ibogaine-based addiction treatment for opiate dependence sponsored by the Multidisciplinary Association for Psychedelic Studies (MAPS).

    Mary Clare Ditton: A Home for Ibogaine in Barcelona

  • Researchers conducted a long-term observational study on 1,300 healthy women living in the small town of Erpe-Mere, Belgium.

    ANOTHER reason not to use birth control pills

  • The paper, which in scientific terms is known as an observational note and not a full-blown study, helped to make polar bears the public face of the implications of climate change.

    NYT > Home Page

  • The long-term observational study involved 130,054 men and women, 18 to 90 years old, with the majority less than 50 years old. - latest science and technology news stories


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