verb

• (chemistry) To separate (a mixture) into its individual constituents by exploiting differences in some chemical or physical property, such as boiling point, particle size, solubility etc.
• (radiotherapy) To divide a total dose of radiation into fractions.
• (cryptography) To divide each plaintext symbol into several ciphertext symbols as a preliminary stage of encryption.
• To use the technique of fractionation in hypnosis.