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The longest English word is pneumonoultramicroscopicsilicovolcanoconiosis, which is forty-five letters long and refers to a type of lung disease. If you're including technical words, the longest English word— and longest word in the world—is this word, a chemical name for a protein that is 189,819 letters long.

INTO JAPANESE

最も長い英語の単語は、pneumonoultramicroscopesilicovolcanoconiosis で、45 文字の長さで、肺疾患の一種を指します。専門用語を含めると、最も長い英語の単語、そして世界で最も長い単語はこの単語です。これは 189,819 文字の長さのタンパク質の化学名です。

BACK INTO ENGLISH

The longest English word is pneumonoultramicroscopesilicovolcanoconiosis, which is 45 letters long and refers to a type of lung disease. Including technical terms, this is the longest word in the English language, and the longest word in the world. This is the chemical name of a protein that is 189,819 characters long.

INTO JAPANESE

最も長い英語の単語は pneumonoultramicroscopesilicovolcanoconiosis で、長さは 45 文字で、肺疾患の一種を指します。専門用語を含めると、これは英語の中で最も長い単語であり、世界で最も長い単語です。これは、189,819 文字の長さのタンパク質の化学名です。

BACK INTO ENGLISH

The longest English word is pneumonoultramicroscopesilicovolcanoconiosis, which is 45 characters long and refers to a type of lung disease. Including the technical terminology, this is the longest word in the English language and the longest word in the world. This is the chemical name of a protein that is 189,819 characters long.

INTO JAPANESE

最も長い英語の単語は pneumonoultramicroscopesilicovolcanoconiosis で、長さは 45 文字で、肺疾患の一種を指します。専門用語を含めると、これは英語で最も長い単語であり、世界で最も長い単語です。これは、189,819 文字の長さのタンパク質の化学名です。

BACK INTO ENGLISH

The longest English word is pneumonoultramicroscopesilicovolcanoconiosis, which is 45 characters long and refers to a type of lung disease. Including the technical terminology, this is the longest word in the English language and the longest word in the world. This is the chemical name of a protein that is 189,819 characters long.