The longest word in Romanian is pneumonoultramicroscopicsilicovolcaniconioză, the long name of silicoză (silicosis), at 44 letters long. It is a chronic respiratory disease.[1] Its name in English is pneumonoultramicroscopicsilicovolcanoconiosis and it is the longest English word in a major English dictionary.[2][3] However, the Dicționarul explicativ al limbii române ("Explanatory Dictionary of the Romanian Language", DEX)[1] says the longest word in Romanian is electroglotospectrografie, which is a medical stabilization method. It has 25 letters and comes from the French word électroglottospectrographie.[4][5]
The longest Romanian words are:[1][6]
Most other longest Romanian words are 23 or 21 letters long.[5]
There are other words that break other records in Romanian. The longest word with two vowels only is uiuiu (an interjection) and the longest one with all vowels, including the ones with diacritics, is autoînsămânțările.[1][6] Both words are in the DEX.[7][8]