The interval between the lower and upper measuring limits of an instrument, i.e. a thermometer with a range of -35 to 50

The amount of moisture which, if available, would be removed from a given land area by evapotranspiration. Expressed in units of water depth.

A remote indicator for wind speed and direction used in conjunction with a contact anemometer and a wind vane. The indicator consists of a center light, connected to the contact anemometer, surrounded by eight equally spaced lights which are individually ...

Same as fogbow.

A hypothetical body which absorbs some constant fraction, between zero and one, of all electromagnetic radiation incident upon it, which fraction is the absorptivity and is independent of wavelength. Compare to black body, white body.

An instrument for measuring the extinction coefficient in water.

The older name for the Celsius temperature scale. Officially abandoned by international agreement in 1948, but still in common use.

A buoyant balloon rising freely in the atmosphere, as opposed to a captive balloon.

Part of a computer word that has meaning in itself, often, a byte.

Wind with a speed between 22 and 27 knots (25 and 31 mph); Beaufort scale number 6.

Any horizontal wind velocity tangent to the contour line of a constant pressure surface (or to the isobar of a geopotential surface) at the point in question.

A hygrometer using goldbeater's skin as the sensitive element. Variations of the physical dimensions of the skin caused by its hygroscopic character indicate relative humidity. (Note: Goldbeater's skin is the prepared outside membrane of the large intesti ...

An instrument for measuring angles of inclination. Used in conjunction with a ceiling light to measure cloud height at night.

An instrument for determining the dust content of a sample of air. Also spelled conimeter.

A plastic molding component formed by the reaction of phenol and formaldehyde. It can be heavily reinforced or "filled" with glass fibers or other materials. Phenolics are known for their high impact strength, excellent wear characteristics, and dimension ...

A graduated scale placed in a position so that the stage of a stream may be read directly from it. Staff gauges may be placed on bridge piers or pilings, etc., or placed on specially constructed supports.

A metallic element of atomic weight 200.6 1, unique (for metals) in that it remains liquid under all but very extreme temperatures.

Operation mode of a communication circuit in which each end can transmit and receive, but not simultaneously.

A diagram showing the intensity of the radiation field in all directions from a transmitting radio or radar antenna at a given distance from the antenna.

An instrument that shows changes in humidity.