Question

which is the longest letter ​

Answer 1

Answer:

pneumonoultramicroscopicsilicovolcanoconiosis. Appearing in the Oxford English Dictionary, this 45-letter word for a disease is the longest English word that is defined in a major dictionary. It's a technical word referring to the lung disease more commonly known as silicosis.

Answer 2

Pneumonoultramicroscopicsilicovolcanoconiosis

Explanation:

according to the english Oxford dictionary this is the longest leter