Floccinaucinihilipilification is one of a number of very long words that occur very rarely in genuine use. Based on Latin [Term?]: flocci (āwispā) +ā nauci (ātrifleā) +ā nihil (ānothingā) +ā pili (āhairā) +ā -ficationA jocular coinage, apparently by pupils at Eton College, combining a number of roughly synonymous Latin stems. Often cited as the longest non-technical word in the English language, being one letter longer than the commonly cited antidisestablishmentarianism.
The word was inspired by a line in the Eton Latin Grammar that gave a rule for certain verbs that take an object in the genitive case: āflocci, nauci, nihilÄ«, pilÄ«, assis, huius, teruncii, hÄ«s verbÄ«s, aestimÅ, pendÅ, faciÅ, pecÅ«liÄriter addunturā. This translates loosely to: āThe verbs aestimo, pendo and facio when used in the sense of āto valueā or āto careā irregularly take the following objects in the genitive case: flocci, nauci, nihilÄ«, pilÄ«, assis (āpennyā), huius (āthisā) and teruncii (āfarthingā)ā.