insulator

2 definitions found

insulator - Collaborative International Dictionary of English v.0.48 :

  Insulator \In"su*la`tor\, n.
     1. One who, or that which, insulates.
        [1913 Webster]
  
     2. (Elec. & Thermotics) A substance or object that insulates;
        a nonconductor; as, polyurethane foam is a popular thermal
        insulator.
        [1913 Webster +PJC]

insulator - WordNet (r) 2.1 (2005) :

  insulator
      n 1: a material such as glass or porcelain with negligible
           electrical or thermal conductivity [syn: insulator,
           dielectric, nonconductor] [ant: conductor]