A balanced condition within a system of chemical reactions. When in chemical equilibrium, substances form and break down at the same rate, and the number of molecules of each substance becomes definite and constant.
- Chemical evolution
The formation of complex organic molecules from simpler inorganic molecules through chemical reactions in the oceans during the early history of the Earth; the first step in the development of life on this planet. The period of chemical evolution lasted less than a billion years. Note: Many of the steps in chemical evolution can now […]
noun 1. a distinctive characteristic or pattern indicating the presence of a certain molecule, used to identify a chemical.
[kem-i-kuh l] /ˈkɛm ɪ kəl/ noun 1. a substance produced by or used in a chemical process. 2. chemicals, Slang. narcotic or mind-altering drugs or substances. adjective 3. of, used in, produced by, or concerned with or chemicals: a chemical formula; chemical agents. 4. used in : chemical weapons. /ˈkɛmɪkəl/ noun 1. any substance used […]
Trademark. 1. . [meys] /meɪs/ Trademark. 1. a nonlethal spray containing purified tear gas and chemical solvents that temporarily incapacitate a person mainly by causing eye and skin irritations: used especially as a means of subduing rioters. /meɪs/ noun 1. a club, usually having a spiked metal head, used esp in the Middle Ages 2. […]