Pneumonoultramicroscopicsilicovolcanoconiosis…the longest word in the English language ?

The longest word in the major English language dictionaries is

pneumonoultramicroscopicsilicovolcanoconiosis

( 45 letters)

pneu·mo·no·ul·tra·mi·cro·scop·ic·sil·i·co·vol·ca·no·co·ni·o·sis

Meaning: a disease caused by the prolonged inhalation of fine siliceous dust, specifically from a volcano.

Also spelled pneumonoultramicroscopicsilicovolcanokoniosis

Research has discovered that this word was originally a hoax: medically, it is the same as silicosis.

The Oxford English Dictionary contains

pseudopseudohypoparathyroidism   (30 letters)

/pseu·do·pseu·do·hy·po·para·thy·roid·ism/

Meaning: an incomplete form of pseudohypoparathyroidism marked by the same constitutional features but by normal levels of calcium and phosphorus in the blood serum.

The longest non-technical word in major dictionaries is

flocci­nauci­nihili­pili­fication  (29 letters)

flahk-si-naw-si-ni-hi-li-pi-li-fi-kay-shên

Meaning: The action or habit of judging something to be worthless.

1741: William Shenstone, William Shenstone, Letters,

”I loved him for nothing so much as his flocci-nauci-nihili-pili-fication of money.”

References:

Wikipedia

Wiktionnaire

About.com

AskOxford.com

next: the longest word in the Spanish language

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