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1. Music
a. not sharp or flat
b. denoting a note that is neither sharp nor flat
c. (of a key or scale) containing no sharps or flats
2. Music of or relating to a trumpet, horn, etc., without valves or keys, on which only notes of the harmonic series of the keynote can be obtained
3. Cards
a. (of a card) not a joker or wild card
b. (of a canasta or sequence) containing no wild cards
c. (of a bid in bridge) describing genuine values; not conventional
4. based on the principles and findings of human reason and what is to be learned of God from nature rather than on revelation
5. Music
a. an accidental cancelling a previous sharp or flat.
b. a note affected by this accidental
6. Pontoon the combination of an ace with a ten or court card when dealt to a player as his or her first two cards
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

tropical year

tropical yearclick for a larger image
The period between two successive vernal equinoxes, the time the earth takes to complete one orbit around the sun relative to the first point of Aries. Its length was 365 days 5 h 48 min and 45.19 s in 2000, and it is changing by 0.00000006162 x y days (y in Julian years from 2000), or about 5 milliseconds/year. The tropical year differs from the solar year by 1 part in 26,000, since this is the period of the earth's precession about its rotational axis combined with the precession of the perihelion of the earth's orbit. Also called an astronomical, equinoctial, natural, or solar year. It contains one complete cycle of seasons.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved


An integrated 4GL from Software AG, Germany. The menu-driven version is SUPER/NATURAL.

Natural 2 is a major upgrade to Natural 1.

Version 2.1.7 in the MVS environment (June 1995, also available for Unix).

Natural works with DB2 and various other databases, but Natural and Adabas normally go together. There are many products available in the "Natural" family, including SuperNatural, Natural for Windows, Entire Connection (enables up/downloading and interaction with Excel) and Esperant.
This article is provided by FOLDOC - Free Online Dictionary of Computing (


An earlier fourth-generation language from Software AG, Reston, VA, that ran on a variety of computers from micro to mainframe. See fourth-generation language.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
In flooded areas, Piedmont crews will respond to affected neighborhoods to inspect natural gas meters for signs of submersion.
WELD: Stop putting every natural item in the vitamin aisle!
Other natural gas data and analyses may be found through the "Natural Gas" section of EIA's web site.
Recognizing the importance of the natural and organic products sector, IRI this year partnered with SPINS LLC to provide better information about how consumers really shop for and buy these products.
The potential surge in natural gas demand has prompted questions on how this increase in demand will impact natural gas prices, particularly when the U.S.
Natural England says that the vital role the natural world plays in contributing to a thriving economy continues to be undervalued and the report brings together the latest research to show that the economic value of nature now runs to billions of pounds in the UK.
With less and less wild and undeveloped space for natural processes to continue, the environment is losing its resilience.
The natural sodas come in seven flavors and are also sweetened using organic evaporated cane juice, with natural flavors and coloring.
Jim and Kleiwerks recognized that by getting small, beautiful, and well-built natural structures on the ground, building officials would have the opportunity to see them first-hand.
In the United States, natural gas supplies have been squeezed as well.
LNG, PNG and CNG are all forms of natural gas: Liquefied, Pipeline or Compressed, and LPG, Liquid Petroleum Gas, is, as the name suggests, an oil derivative.