Definitions and Meanings of Long Words in English
Pseudopseudohypoparathyroidism: A rare genetic disorder where a person has some symptoms of pseudohypoparathyroidism but does not have the actual condition.
Hippopotomonstrosesquipedaliophobia: Ironically, it means the fear of long words.
Floccinaucinihilipilification: The act of describing or regarding something as unimportant or valueless.
Antidisestablishmentarianism: A political movement opposing the withdrawal of state support from an established church, particularly in 19th-century Britain.
Honorificabilitudinitatibus: A 27-letter word used by Shakespeare in "Love's Labour's Lost," meaning "the state of being able to achieve honors."
Supercalifragilisticexpialidocious: The famous made-up word from Disney's Mary Poppins, used to express something fantastic or extraordinary.
Electroencephalographically: In a manner related to the recording of electrical brain activity via electroencephalography (EEG).
Incomprehensibilities: The plural form of "incomprehensibility," which means the state of being difficult or impossible to understand.
Disproportionableness: The quality or state of being out of proportion or unequal in size or amount.
Dichlorodifluoromethane: A chemical compound formerly used as a refrigerant and aerosol propellant.
Psychoneuroendocrinological: Relating to the study of the interactions between the mind, nervous system, and hormonal system.
Otorhinolaryngological: Relating to the medical specialty dealing with the ears, nose, and throat (ENT).
Although each of these terms has a specific meaning, keep in mind that many of them aren't used often in spoken English. They frequently show up in specialist or technical contexts.