what is the longest word in english dictionary ? June 21, 2016Word Puzzleslongest word, longest word in dictionary, what is the longest word in english dictionary ?adminQuestion : what is the longest word in english dictionary ?Answer :pneumonoultramicroscopicsilicovolcanoconiosis – a supposed lung disease – 45 lettersShare this:Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on WhatsApp (Opens in new window)