The word transduction has several meanings:

• In biophysics, transduction is the conveyance of energy from one electron (a donor) to another (a receptor), at the same time that the class of energy changes.
• In developmental psychology, transduction is reasoning from specific cases to specific cases, typically employed by children.
• In engineering, transduction is a process that converts one type of energy to another. A device that does this is called a transducer.
• In genetics, transduction is the transfer of viral, bacterial, or both bacterial and viral DNA from one cell to another via bacteriophage.
• In machine learning, transduction is directly drawing conclusions about new data from previous data, without constructing a model.
• In physiology, transduction is transportation of stimuli to the nervous system.
• In semiotics, transduction is the translation from a sign or concept from one field of knowledge to a different one. It differs from "traduction" with regard to its deepest necessity of adaptation.