- conductor of an integral closure
- conductor of a number field
- conductor potential
- conductor-ramification theorem
- conductor transposition of overhead transmission line
- conductron
- conductus
- conduit
- condyloma
- condyloma acuminatum
- condylus
- cone
- conea
- cone-and-socket joint
- cone calorimeter
- cone cell
- cone classifier
- cone condition
- cone convex function
- cone criterion
- cone crusher
- cone effect
- cone emission
- cone extension
- cone extreme point