What does cataphoresis mean?
Cataphoresis is the movement of charged particles suspended in a fluid toward the cathode, the negatively charged electrode, when an electric field is applied across that fluid. It is one of the two directional forms of electrophoresis, the general phenomenon of particle migration under electrical force; its counterpart, in which particles move toward the positive anode, is called anaphoresis. The term belongs chiefly to colloid chemistry and electrochemistry, where it has been used to describe the behavior of clays, proteins, and other charged suspensions. In early twentieth-century medicine, cataphoresis also named a treatment in which electric current carried ionized drugs through the skin, a technique now generally called iontophoresis. Though technical in register and uncommon in everyday speech, the word captures a foundational principle of electrokinetics — one that underlies laboratory separation methods such as gel electrophoresis, widely used in biochemistry, genetics, and forensic analysis.
nounThe movement of colloidal particles or other suspended matter toward the cathode (the negatively charged electrode) under the influence of an applied electric field; it is the cathode-directed form of electrophoresis.
- Migration of charged colloidal particles or suspended matter toward the cathode under an applied electric field.
- The application of electric current to drive medicinal substances into body tissue (historical use in physical therapy).
"The chemists used cataphoresis to separate the charged protein fragments in the solution."
"Under the applied voltage, cataphoresis drew the negatively charged clay particles steadily toward the cathode."
"Early twentieth-century clinics employed cataphoresis to deliver ionized medication through the skin."
The plural follows the standard Greek -is → -es pattern; it is rarely needed, since the term usually appears in singular or uncountable use.
"Multiple cataphoreses were performed to compare the mobility of the different samples."
In cataphoresis, electricity literally pulls particles through a liquid toward the negative pole — a principle so reliable that it became the basis of modern gel electrophoresis, the technique behind DNA fingerprinting.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cataphoresis
Cataphoresis derives from Greek roots: 'kata-', meaning 'down' or 'toward', combined with 'phorein', meaning 'to bear' or 'to carry', with the '-sis' suffix denoting a process. The term was coined in the nineteenth century as scientists investigated the motion of charged particles in electric fields, alongside its sibling term anaphoresis ('carrying up'). It shares this Greek root with the broader terms electrophoresis and phoresis, all describing processes in which an external force carries particles through a medium.
Related word forms
How cataphoresis is actually used
A technical term confined to chemistry, colloid science, and medical history; it is rarely encountered outside specialist literature. In modern usage, scientists more often say 'electrophoresis' and specify the direction of migration separately.
Easily confused with cataphoresis
Anaphoresis is the opposite process — migration of particles toward the anode (positive electrode) rather than toward the cathode.
Cataphora is a linguistic term for a grammatical construction in which a word refers forward to something mentioned later in the sentence, whereas cataphoresis is an electrochemical phenomenon.