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gnat

(Encyclopedia)gnat, common name for any one of a number of small, fragile-looking two-winged flies of the suborder Nematocera, order Diptera, which includes the families Tipulidae (crane flies), Bibionidae (hairfli...

jute

(Encyclopedia)jute jo͞ot [key], name for any plant of the genus Corchorus, tropical annuals of the family Tiliaceae (linden family), and for its fiber. Many species yield fiber, but the chief sources of commercial...

coca

(Encyclopedia)coca kōˈkə [key], common name for shrubs of the genus Erythroxylum, particularly E. coca, of the family Erythroxylaceae, and found abundantly in upland regions and on mountain slopes of South Ameri...

fertilization

(Encyclopedia)CE5 Fertilization of an egg cell fertilization, in biology, process in the reproduction of both plants and animals, involving the union of two unlike sex cells (gametes), the sperm and the ovum, f...

fertilizer

(Encyclopedia)fertilizer, organic or inorganic material containing one or more of the nutrients—mainly nitrogen, phosphorus, and potassium, and other essential elements required for plant growth. Added to the soi...

transpiration

(Encyclopedia)transpiration, in botany, the loss of water by evaporation in terrestrial plants. Some evaporation occurs directly through the exposed walls of surface cells, but the greatest amount takes place throu...

witch hazel

(Encyclopedia)CE5 Witch hazel, Hamamelis virginiana witch hazel, common name for some members of the Hamamelidaceae, a family of trees and shrubs found mostly in Asia. The family includes the large genus (Coryl...

yucca

(Encyclopedia)yucca yŭkˈə [key], any plant of the genus Yucca, stiff-leaved stemless or treelike succulents of the family Liliaceae (lily family), native chiefly to the tablelands of Mexico and the American Sout...

biology

(Encyclopedia)biology, the science that deals with living things. It is broadly divided into zoology, the study of animal life, and botany, the study of plant life. Subdivisions of each of these sciences include cy...

coal

(Encyclopedia)coal, fuel substance of plant origin, largely or almost entirely composed of carbon with varying amounts of mineral matter. Coal is found in beds or seams interstratified with shales, clays, sands...