What is the second worlds longest word?

This question is a bit tricky! There's no single definitive answer for the "second longest word" because it depends on how you define "word." Here's why:

* Formal Words: If we're talking about words that are commonly used and found in dictionaries, the second longest word would likely be "pneumonoultramicroscopicsilicovolcanoconiosis" (45 letters). This is a lung disease caused by inhaling very fine silica dust.

* Technical Terms: However, there are longer technical terms in fields like chemistry or biology. These might not be everyday words, but they are still considered "words" in their specific contexts.

* Made-up Words: It's also possible to create extremely long words by combining existing words or roots. There's even a word called "floccinaucinihilipilification" (29 letters) which means "the act of estimating something as worthless," though it's not commonly used.

Therefore, there's no single correct answer. The second longest word depends on the specific criteria you're using.