circuit board 
noun
A thin rigid board containing an electric circuit; a printed circuit.With the circuit board securely fastened thereon, the upper board is placed on the lower board....
- The system works through an electronic circuit board attached to the coin acceptor in a vending machine.
- A motherboard - a circuit board on which computer chips are joined together - is the basis of a computer.
- photoisomeric
- photoisomerisation
- photoisomerise
- photoisomerism
- photoisomerization
- photoisomerize
- photojournalism
- photojournalist
- photojournalistic
- photokeratitis
- photokinesis
- photokinetic
- photolabile
- photolability
- photo librarian
- photo library
- photolith
- photolitho
- photolithograph
- photolithographer
- photolithographic
- photolithographically
- photolithography
- photolitho offset
- photolithotroph