General English

  • noun a statement of a scientific fact, often shown by means of symbols
  • noun a set of plans for achieving something

General Science

  • noun a representation of the chemical composition of a compound in terms of its atoms

Cars & Driving


  • noun a set of mathematical rules applied to solve a problem


  • A mathematical expression utilized to relate quantities and solve problems. For example, the mass-energy equation is expressed as: E = mc2, where E is energy, m is mass, and c is the speed of light in a vacuum.
  • A combination of chemical symbols and numbers which describes the chemical composition of a substance. For instance, the chemical formula of boron trichloride is BCl3, indicating that for each boron atom there are three chlorine atoms. Also called chemical formula (2).


  • noun a way of indicating the composition of a chemical compound using letters and numbers, e.g. H2SO4
  • noun powdered milk for babies

Information & Library Science

  • noun a set of numbers, letters or symbols which represents a mathematical or scientific rule