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chelate in chemistry, of or designating a compound in which the central metallic ion is bonded with two or more nonmetallic atoms to form a closed chain. [7 definitions]
chelicera either of the first pair of appendages of spiders, ticks, and the like, esp. used for grasping.
chelonian of, concerning, or belonging to the group of reptiles that includes the turtles and tortoises. [2 definitions]
chemical a distinct substance, such as an element or molecular compound, used in or obtained through a reaction involving atomic or molecular changes. [3 definitions]
chemical engineering the professional, scientific, or industrial use of chemistry and chemical products; technology of chemistry.
chemical-free made or grown without and containing no added chemicals that could harm life or the environment.
chemical warfare the use of chemicals such as poisonous gases, fire bombs, and irritants in warfare.
chemiluminescence the production of light in certain chemical reactions at low temperatures.
chemin de fer a variation of the card game baccarat.
chemise an unfitted women's undergarment; shift. [2 definitions]
chemist one who is active or expert in the field of chemistry. [3 definitions]
chemistry the science that studies the structures, functions, transformations, and interactions of basic elements, as, for example, carbon, oxygen, hydrogen, and sodium, as well as complex substances that combine basic elements. [4 definitions]
chemo- chemical.
chemoreception the response of a sense organ or nerve ending to a chemical stimulus.
chemoreceptor a nerve ending or sensory organ, as of taste or smell, that responds to chemical stimulation.
chemosurgery the selective removal or destruction of tissue by chemical rather than surgical means.
chemosynthesis the synthesis of organic substances by an organism using energy provided by a chemical reaction.
chemotherapy the science or practice of destroying disease-causing microorganisms or malignant tissue by use of chemicals, esp. toxic ones.
chemurgy the industrial development of new chemical products from organic raw materials, usu. farm products.
Cheng Tang first leader of the Shang dynasty of China, ruling in approximately the seventeenth century B.C.E. (exact dates contested).
chenille a tufted or velvetlike cord, used in embroidery and for fringes, or woven into a fabric. [2 definitions]