Definition of natural disaster : a sudden and terrible event in nature (such as a hurricane, tornado, or flood) that usually results in serious damage and many deaths The earthquake was one of the worst natural disasters of this century.
Synthesis, Chemical. the planned production of complex compounds from simpler compounds based on a knowledge of the reactantsâ chemical structure and reactivity. Chemical synthesis usually implies a sequence of several chemical processes (steps). In the early period in the development of chemistry, chemical synthesis was carried out mainly for inorganic compounds and was fortuitous in nature.
Noun. 1. chemosynthesis-synthesis of carbohydrate from carbon dioxide and water; limited to certain bacteria and fungi. synthesis-the process of producing a chemical compound (usually by the union of simpler chemical compounds).. The synthesis of organic compounds by certain bacteria, especially in deep-sea hydrothermal vents, using energy obtained from the chemical oxidation of simple inorganic compounds. Chemosynthesis is thought to have been used by the first forms of life on Earth. cheâ²moÂ·synÂ·thetâ²ic (-sÄ­n-thÄtâ²Ä­k) adj.