Science terms starting with D

722 terms

  1. Dust Storm A severe weather condition characterized by strong winds and dust-filled air over an extensive area.
  2. Dust Whirl A rotating column of air rendered visible by dust.
  3. Dutch oven furnace One of the earliest types of furnaces, having a large, rectangular box lined with firebrick (refractory) on the sides and top.
  4. Duty Cycle The duration and periodicity of the operation of a device.
  5. DVA - deficiency verification analysis.
  6. DVLP Develop
  7. DVV Downward Vertical Velocity (sinking air)
  8. DWNDFT Downdraft - A small-scale column of air that rapidly sinks toward the ground, usually accompanied by precipitation as in a shower or thunderstorm.
  9. DWNSLP Downslope
  10. DWPT Dew Point - A measure of atmospheric moisture. It is the temperature to which air must be cooled in order to reach saturation (assuming air pressure and…
  11. Dynamic compaction A method of compacting soil by dropping a heavy weight onto loose soil.
  12. Dynamic equilibrium Condition achieved when the average sand load transported by flowing water is in balance with the sand load being supplied by tributaries.
  13. Dynamic Head The pressure equivalent of the velocity of a fluid.
  14. Dynamic Ice Pressure due to a moving ice cover or drifting ice.
  15. Dynamic Lifting The forced uplifting of air from various atmospheric processes, such as weather fronts, and cyclones.
  16. Dynamic pressure When a pump is operating, the vertical distance from a reference point (such as a pump centerline) to the hydraulic grade line.
  17. Dynamic Wave Routing Model (DWOPER) A computerized hydraulic routing program whose algorithms incorporate the complete one-dimensional equations of unsteady flow originally developed by…
  18. Dynamics Changes over a length of time.
  19. Dynamo A machine for converting mechanical energy into electrical energy by magneto-electric induction; may be used as a motor.
  20. Dynamometer An apparatus for measuring force or power, especially the power developed by a motor.
  21. Dyne The absolute centimeter-gram-second unit of force; that force that will impart to a free mass of one gram an acceleration of one centimeter per second per…
  22. DZ Drizzle