You don't have to be a rocket scientist to use zeroth, but the word, which was coined by physicists 120 years ago, does often show up in scientific contexts. (It comes from zero, which is itself from Arabic …

Dec 14, 2025 · zeroth (not comparable) (mathematics) In the initial position in a sequence whose elements are numbered starting at zero; the ordinal number corresponding to zero.

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ZEROTH definition: coming in a series before the first. See examples of zeroth used in a sentence.

Look up zeroth in Wiktionary, the free dictionary.

zeroth in American English (ˈzɪərouθ) adjective coming in a series before the first

Define zeroth. zeroth synonyms, zeroth pronunciation, zeroth translation, English dictionary definition of zeroth. adj. Of or relating to the ordinal number matching the number 0 in a series: the zeroth power …

4 days ago · "Zeroth." Vocabulary.com Dictionary, Vocabulary.com, https://www.vocabulary.com/dictionary/zeroth. Accessed 16 Jan. 2026. Copy citation Examples from …

zeroth, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

"Zeroth" typically refers to something that comes before the "first" in a series, process or system. It's often used in laws, principles or rules in various scientific fields, denoting the principle that precedes …