What is another word for one-quadrillionth?
Pronunciation: [wˈɒnkwˈɒdɹɪlˌi͡ənθ] (IPA) 
Searching for synonyms for "one-quadrillionth" can be a tricky task, as it is already an extremely small fraction. However, there are some words that can be used to express this amount such as "septillionth," "trilliardth," "quattuordecillionth," "quindecillionth," and "sexdecillionth." These words are specific to numbers that come after a quadrillion, which is an incredibly large number. It is important to note that usage of such words in everyday parlance is rare, as our day to day tasks and activities rarely require dealing with such extremely specific numbers. However, for scientific or mathematical purposes, having a variety of words to describe minuscule amounts are necessary.
