ondergrondse

Definitions of ondergrondse
  1. noun
    an electric railway operating below the surface of the ground (usually in a city)
    synonyms: metro, voetgangerstunnel
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    type of:
    spoorlijn, spoorwegmaatschappij
    line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight
  2. noun
    electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
    synonyms: elektronenbuis, kathodestraalbuis, metro, vacuümbuis
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    types:
    diode
    a thermionic tube having two electrodes; used as a rectifier
    penthode, pentode
    a thermionic tube having five electrodes
    röntgenbuis
    a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
  3. noun
    a secret group organized to overthrow a government or occupation force
    synonyms: illegaliteit, verzet, verzetsbeweging, verzetsorganisatie
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    types:
    maquis
    the French underground that fought against the German occupation in World War II
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