context: Among the words listed in the standard Korean dictionary compiled by the National Institute of the Korean Language, the word nicotinamide adenine dinucleotide (nicotinamide adenine dinucleotide) is the longest word with 19 characters. (The same word, nicotinamide adenine dinucleotide is 16 characters.) In addition, celadon-yang incense and inscriptions were produced in the Goryeo Dynasty. 17 characters [1], chlorotrifluoroethylene polymer is 15 characters and programmable read only memory. 13 words. Most of the long words are academic terminology. Among the names of animals and plants, 12 blotches of Sansevieria, [2] blue-eyed butterfly with a fine spot, moss-poplars, leaf worms, flatworm worms, and 11 worms. Among the items not listed in the Standard Korean Dictionary are small red-spotted blue-eyed butterflies (13 characters) and fat tailed dwarf lemurs (12 characters).
question: What is the longest word in Hangeul?
answers.text: nicotinamide adenine dinucleotide