Conductor

Conductor or conduction may refer to:

Human roles

• Conductor (music), a person who leads a musical ensemble.
• Conductor (rail), a captain of the crew of a train or tram
• Bus conductor, a person who checks passengers' tickets on a bus
• Conductor (military appointment), a senior Warrant Officer appointment in the Royal Logistic Corps and its predecessors

Biology

• Conductor of a recessive gene: Genetic carrier

Mathematics

• Conductor (ring theory), an ideal of a ring that measures how far it is from being integrally closed
• Conductor of an abelian variety, a description of its bad reduction
• Conductor of a Dirichlet character, the natural (smallest) modulus for a character
• Conductor (class field theory), a modulus describing the ramification in an abelian extension of local or global fields
• Artin conductor, an ideal or number associated to a representation of a Galois group of a local or global field
• In the theory of numerical semigroups, the conductor of a numerical semigroup is the smallest integer in the semigroup such that all subsequent integers are likewise in the semigroup.

Physics

• Electrical conductor, an object, substance or material allowing the flow of an electric charge
  • Electrical resistivity and conductivity, the movement of charged particles through an electrical conductor
  • Electrical resistance and conductance
  • Fast ion conductor, a solid-state electrical conductor which conducts due to the movement of ions
  • Mixed conductor, a solid state electrical conductor which conducts due to the movement of ions and electrons
  • Electrical conduction system of the heart
• Thermal conduction, the transfer of thermal energy through matter
  • Thermal conductivity

Other uses

• Conductor (album), an album by indie rock band The Comas
• Conductor (architecture), a traditional name for a downspout
• Conductor (company), a provider of SEO services platforms based in New York City
• Conductor (underground railroad), an operative of the Underground Railroad of the 19th century United States helping move slaves to freedom
• The conductor, part of the palpal bulb of male spiders
• Mr. Conductor, a character in Shining Time Station and in Thomas and the Magic Railroad
• Conduction, a type of structured free improvisation in music notably practiced by Butch Morris
• The Conductor (film), a 2012 Russian film by Pavel Lungin
• The Orchestra Conductor aka The Conductor, a 1980 Polish film by Andrzej Wajda