A new website called the Historical Dictionary of Science Fiction is taking us back through the words that have made sci-fi what it is and showing how much this genre has shaped popular culture.
Noah Webster's “An American Dictionary of the English Language” defined American English as people actually spoke it, but it also included some words that haven't exactly stayed with us.
Languages change over time; Merriam-Webster said it added over 500 new words to the dictionary last month. But you can also see those new additions over time through the Time Traveler feature on Merriam-Webster's website.