It refers to a lung disease that you can get from inhaling very fine silca particles from a volcano.
Person: Okay then, I am not calling you by your name, where are your parents.
Child: My dad went to get milk, and my mom has pneumonoultramicroscopicsilicovolcanoconiosis.
Person: What is wrong with you?!
Child: SILICOSIS
by Aqualine December 05, 2021
Get the Pneumonoultramicroscopicsilicovolcanoconiosis mug.
Fuck I can't even say tha- oh I'm typing? Oops... ok... pneumonoultramicroscopicsilicovolcanoconiosis is a lung disease caused by breathing in silicate dust... ye, that's all it is...
If you breathe in silicate dusts you can get pneumonoultramicroscopicsilicovolcanoconiosis

Pronunciation: new-moh-no-ultra-microscopic-silicoh-vohl-canoh-con-eeoh-sis
by Killertex1211 November 04, 2016
Get the pneumonoultramicroscopicsilicovolcanoconiosis mug.
A lung disease caused by silica dust found in unclean atmosphere.

One of the longest, if not THE longest word in the English language, if the disease doesn't affect you, the sheer length of the word will.
disease longest word in the English language pneumonoultramicroscopicsilicovolcanoconiosis
by Not who you think i am October 27, 2013
Get the pneumonoultramicroscopicsilicovolcanoconiosis mug.
its a very loooooooooooong name for a lung disease caused by ash and dustt. sad for those who have it :(
and is a veery looooooong word that some peeps cant pronounce.
Person poop: She has pneumonoultramicroscopicskjkjfjdkfsjlwieruweoruw uh whatever that is
Person smart: You can't even pronounce it!! its pneumonoultramicroscopicsilicovolcanoconiosis hehehe
by purplesunflower June 13, 2023
Get the pneumonoultramicroscopicsilicovolcanoconiosis mug.
a word that refers to a lung disease contracted from the inhalation of very fine silica particles, specifically from a volcano; medically, it is the same as silicosis.
It is very rare to have pneumonoultramicroscopicsilicovolcanoconiosis
by zoomie rae November 20, 2022
Get the pneumonoultramicroscopicsilicovolcanoconiosis mug.
you know I cant spell that come on
P1 Pneumonoultramicroscopicsilicovolcanoconiosis

P2 wow my whole sentence is shorter>
by Braedenater April 03, 2023
Get the Pneumonoultramicroscopicsilicovolcanoconiosis mug.
A lung disease caused by the inhalation of very fine silicate or quartz dust, causing inflammation in the lungs.
I can't believe I have pneumonoultramicroscopicsilicovolcanoconiosis because pneumonoultramicroscopicsilicovolcanoconiosis is so rare for my family.
by Dr. Humunukuapua November 07, 2022
Get the pneumonoultramicroscopicsilicovolcanoconiosis mug.