▁ ▁Techn ical ▁terms ▁▁ ▁A ▁number ▁of ▁scientific ▁naming ▁schemes ▁can ▁be ▁used ▁to ▁generate ▁arbitr arily ▁long ▁words . ▁ ▁The ▁I UP AC ▁nom en cl ature ▁for ▁organ ic ▁chemical ▁comp ounds ▁is ▁open - ended , ▁giving ▁rise ▁to ▁the ▁ 1 8 9 , 8 1 9 - letter ▁chemical ▁name ▁M eth ion yl th re ony l th re ony l ... is ole uc ine ▁for ▁the ▁protein ▁also ▁known ▁as ▁tit in , ▁which ▁is ▁involved ▁in ▁stri ated ▁mus cle ▁formation . ▁In ▁nature , ▁DNA ▁mole cules ▁can ▁be ▁much ▁bigger ▁than ▁protein ▁mole cules ▁and ▁therefore ▁potentially ▁be ▁referred ▁to ▁with ▁much ▁longer ▁chemical ▁names . ▁For ▁example , ▁the ▁whe at ▁chrom os ome ▁ 3 B ▁contains ▁almost ▁ 1 ▁billion ▁base ▁pairs , ▁so ▁the ▁sequence ▁of ▁one ▁of ▁its ▁str ands , ▁if ▁written ▁out ▁in ▁full ▁like ▁A den ily lad en ily l gu an ily l c yst id yl th ym id yl ..., ▁would ▁be ▁about ▁ 8 ▁billion ▁letters ▁long . ▁The ▁longest ▁published ▁word , ▁Ac et yl ser yl ty ros yl ser yl iso ... ser ine , ▁referring ▁to ▁the ▁coat ▁protein ▁of ▁a ▁certain ▁stra in ▁of ▁to b acco ▁m osa ic ▁virus ▁( ), ▁is ▁ 1 , 1 8 5 ▁letters ▁long , ▁and ▁appeared ▁in ▁the ▁American ▁Chem ical ▁Society ' s ▁Chem ical ▁Abstract s ▁Service ▁in ▁ 1 9