The Oxford English Dictionary has a word that is thirty letters long;it is " pseudopseudohypoparathyroidism."
牛津英语词典有一个长达三十个字母的词， 它是“假性甲状旁腺功能减退症” 。
英语百科
Pseudopseudohypoparathyroidism
Pseudopseudohypoparathyroidism (pseudoPHP) is an inherited disorder, named for its similarity to pseudohypoparathyroidism in presentation. The term pseudopseudohypoparathyroidism is used to describe a condition where the individual has the phenotypic appearance of pseudohypoparathyroidism type 1a, but is biochemically normal.