(analytical chemistry) A technique that uses ion exchange to separate compounds, anions and cations according to their electrical properties.

(chemistry) the reversible process whereby ions are exchanged between a solution and a solid or gel; cation exchange is the process used in a water softener

To an unusual, remarkable or exceptional degree.

To an excessive degree. / In excess.

Alternative spelling of exactor

The state of being exact.

Making great demands; difficult to satisfy. / (of an action, task, etc) Requiring precise accuracy, great care, effort, or attention. / (of a person or organization) Characterized by exaction.

present participle and gerund of exact

present participle of except

with the exception of