answersLogoWhite

0

pseudopseudohypoparathyroidism (30 letters).The longest word in the Oxford English Dictionary is the 45 letter word

pneumonoultramicroscopicsilicovolcanoconiosis.

According to the dictionary it is a lung disease causing inflammation of the lung from the inhalation of fine silica dust.

User Avatar

Wiki User

12y ago

What else can I help you with?