Definition of ectoplasm noun from the Oxford Advanced American Dictionary

     

    ectoplasm

     noun
    noun
    NAmE//ˈɛktəˌplæzəm//
     
    [uncountable]
     
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  1. 1 (biology) the outer layer of the thick substance inside cells compare endoplasm
  2. 2a substance which is said to come from the body of someone who is communicating with the spirit of a dead person, allowing the spirit to have a form
See the Oxford Advanced Learner's Dictionary entry: ectoplasm