chemical
n
1 any substance used in or resulting from a reaction involving changes to atoms or molecules
adj
2 of or used in chemistry
chemical balance
3 of, made from, or using chemicals chemical fertilizer ♦
chemically adv
chemical bond
n a mutual attraction between two atoms resulting from a redistribution of their outer electrons
See also →
covalent bond →
electrovalent bond →
coordinate bond
chemical engineering
n the branch of engineering concerned with the design, operation, maintenance, and manufacture of the plant and machinery used in industrial chemical processes
♦
chemical engineer n
chemical equation
n a representation of a chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product
chemical machining
n the shaping of a metal part by controlled removal of unwanted metal by a flow of chemical solutions
chemical potential
n a thermodynamic function of a substance in a system that is the partial differential of the Gibbs function of the system with respect to the number of moles of the substance., (Symbol)
<Gmu>
chemical reaction
n a process that involves changes in the structure and energy content of atoms, molecules, or ions but not their nuclei
Compare →
nuclear reaction
chemical warfare
n warfare in which chemicals other than explosives are used as weapons, esp. warfare using asphyxiating or nerve gases, poisons, defoliants, etc.