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From centillion + -th (ordinal suffix).
Etymology from Wiktionary, CC BY-SA 4.0.
centillionth
Today it means: The ordinal form of the number one centillion (10³⁰³ short scale, or 10⁶⁰⁰ long scale). Full definition →
Today it means: The ordinal form of the number one centillion (10³⁰³ short scale, or 10⁶⁰⁰ long scale). Full definition →
From centillion + -th (ordinal suffix).
Etymology from Wiktionary, CC BY-SA 4.0.