non-conˈductor Physics.
[non- 2.]
A substance or medium that does not permit the passage of any form of energy (as heat or electricity).
| 1751 [see conductor 11]. 1759 Phil. Trans. LI. 317 Wax, when it is once in good order, will continue a non-conductor for a long time. Ibid. 896 Wood, properly dried, till it becomes very brown, is a non-conductor of electricity. 1857 Lardner Anim. Phys. §587 Fat..is nearly a non-conductor of heat. 1890 Nature 16 Oct. 601 Volcanic ash..forms one of the most effective non-conductors known. |