American Heritage® Dictionary of the English Language, Fourth Edition
- n. Any of several instruments that measure atmospheric humidity.
Century Dictionary and Cyclopedia
- n. An instrument for measuring the amount of the moisture of the atmosphere, or more accurately for determining the hygrometric state or relative humidity, which is the ratio between the actual amount of water-vapor present in the air and that required in order to saturate it completely. A common form is the Daniell hygrometer, which consists of a bent glass tube terminating in two bulbs, one covered with muslin, the other of black glass and containing ether and a thermometer. Ether being dropped on the muslin of the upper bulb, the vapor within is condensed, and the consequent evaporation of the ether from the other bulb cools the air about it, and finally to such a degree that moisture is deposited upon its black surface. The dropping is now suspended, and the temperature is taken from the inclosed thermometer; the mean between this temperature and that observed when the moisture disappears is the dew-point. The hygrometric state is the ratio between the pressure of water-vapor corresponding respectively to the dew-point and to the temperature of the air at the time as given by the thermometer on the stand. This form is called a dew-point or condensing hygrometer. Instead of a black glass bulb, a silver vessel is sometimes used, as in Regnault's hygrometer. In the chemical hygrometer a known volume of air is passed over some hygroscopic substance, as calcium chlorid, contained in a drying-tube. This absorbs the aqueous vapor, and by its increase in weight gives the means of calculating the amount present in the unit of volume. The wet-bulb thermometer, or psychrometer (see
psychrometer), also gives a simple method of obtaining the hygrometric state, by means of appropriately constructed tables.
- n. meteorology An instrument that measures the humidity of the air or other gases, especially the relative humidity
GNU Webster's 1913
- n. (Physics) An instrument for measuring the degree of moisture of the atmosphere.
- n. measuring instrument for measuring the relative humidity of the atmosphere
- From French hygromètre, from hygro- + -meter (Wiktionary)
“The sharp demarcation of the western frontier by the grasshopper and the hygrometer is another, which will continue to operate until, by irrigation, tree-planting or some other device, a new climate can be manufactured for the Plains.”
“Portnoy advises using a humidity meter, also known as a hygrometer, to keep track of the humidity levels.”
“The instrument she mentioned was the hygrometer, which measures humidity Another view, 16 May, page 19, G2.”
“Concerned individuals can also purchase a hygrometer, which measures indoor humidity that can lead to mold, at a hardware store.”
“The humidity was at 99.9%, the end of the scale of the hygrometer.”
“And here is an electronic hygrometer recording the humidity and the temperature inside the jar thru a hole in the lid.”
“He also developed numerous other instruments, including the manometer, cyanometer, diaphonometer, anemometer and mountain eudiometer, the first electrometer (1766), a device for measuring electric potential by means of attraction or repulsion of charged bodies, and the first hygrometer, utilizing a human hair to measure humidity (1783).”
“Before you buy a dehumidifier, figure out what the relative humidity is inside your home by using a hygrometer, which you can pick up for $20 to $40 at an electronics store like Radio Shack or a home center.”
“I was so giddy I picked up a new hygrometer while I was there, as my previous one had gotten broken about six month back or so.”
“Personally, I like this hygrometer and this mac-like mobile phone.”
These user-created lists contain the word ‘hygrometer’.
rulers, protractors, thermometers, and odometers are not all there is…
I'm wading through Patrick O'Brian's Aubrey/Maturin novels one by one, and someday, I'll wade through them again and list all the words I learned while reading them.
Edit: I started ma...
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