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1. Depending on numbers of particles.
2. Referring to properties of solutions that depend only on the concentration of dissolved substances and not on their nature (for example, osmotic pressure, elevation of boiling point, vapor pressure lowering, freezing point depression).
Etymology: L, colligere, to gather
(in physical chemistry) pertaining to those properties of matter (especially solutions) that depend on the numbers of particles, such as molecules and ions, rather than the chemical identity of any one particle. Colligative properties of solutions include boiling point, freezing point, vapor, pressure, and osmotic pressure.