Question for you : longest word in english language

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here is a question for V+ guys to test their knowledge in english language.the question is "which is the longest word in english language ?".if you tell the , the you have a great passion towards english.i think you guys can answer it.
MUKIL, proud to be a member of Vidyarthiplus.com (V+) - Online Students Community since Mar 2013.
the answer is "PNEUMONOULTRAMICROSCOPICSSILICOVOLCANOCONOISIS" this45 letter word,first coined in 1936means a lung disease caused by the inhabitation of very fine silica dust
MUKIL, proud to be a member of Vidyarthiplus.com (V+) - Online Students Community since Mar 2013.

    Question for you : longest word in english language