21-letter words containing d, a, m, e, s, c
- thermal decomposition — Thermal decomposition is the process in which a chemical species breaks down when its temperature is increased.
- transactinide element — any element having an atomic number higher than 103, the last of the actinide series. These superheavy, radioactive elements are extremely short-lived, and can only be created in the laboratory.
- transcendental number — a number that is not a root of any algebraic equation having integral coefficients, as π or e .