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humidity
(Encyclopedia)humidity, moisture content of the atmosphere, a primary element of climate. Humidity measurements include absolute humidity, the mass of water vapor per unit volume of natural air; relative humidity (...fennel
(Encyclopedia)fennel, common name for several perennial herbs, genus Foeniculum vulgare of the family Umbelliferae (parsley family), related to dill. The strawlike foliage and the seeds are licorice-scented and are...radiometer
(Encyclopedia)radiometer rāˌdēŏmˈətər [key], instrument for detection or measurement of electromagnetic radiation; the term is applied in particular to devices used to measure infrared radiation. One of the ...stem
(Encyclopedia)stem, supporting structure of a plant, serving also to conduct and to store food materials. The stems of herbaceous and of woody plants differ: those of herbaceous plants are usually green and pliant ...nursery
(Encyclopedia)nursery, in horticulture, an establishment or area for the propagation, breeding, and early cultivation of plants. In North America the term nursery originally specified a place where hardy woody plan...degree-day
(Encyclopedia)degree-day, a unit of measure used to estimate the fuel and power requirements in heating and cooling a building; it is equal to a difference of 1 degree between the outdoor daily average temperature ...electric fish
(Encyclopedia)electric fish, name for various fish that produce electricity by means of organs usually developed from modified muscle tissue. The electric eels of South America are freshwater knifefish unrelated to...Taj Mahal
(Encyclopedia)Taj Mahal täzh məhälˈ, täj məhŭlˈ [key], mausoleum, Agra, Uttar Pradesh state, N India, on the Yamuna River. It is considered one of the most beautiful buildings in the world and the finest ex...soap plant
(Encyclopedia)soap plant, any of various plants having cleansing properties. A few are of commercial importance, but most soap plants are used locally, as in early times, for toilet and laundry purposes. The soapba...nomad
(Encyclopedia)nomad nōˈmădˌ [key], one of a group of people without fixed habitation, especially pastoralists. (Some authorities prefer the terms “nonsedentary” or “migratory” rather than “nomadic” ...Browse by Subject
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