sept-

prefix

Seven: forming words relating to seven.

“un- (“1”) + bi- (“2”) + sept- (“7”) + -ium (element suffix) → unbiseptium (“element 127”)”

OriginLatin septem →
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

prefix
  1. Seven: forming words relating to seven.
  2. chemistryUsed for the digit seven to form systematic element names of elements whose existence has been predicted, and which have not yet been given a trivial name.

    un- (“1”) + bi- (“2”) + sept- (“7”) + -ium (element suffix) → unbiseptium (“element 127”)

Synonyms & antonyms

Also see
hepta-septem-

Origin

  1. Latinseptem“seven”
  2. Englishsept-

From Latin septem (“seven”).

More words from Latin

Full word history & related roots →
Cite this entry
APA

sept-. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/sept-

MLA

“sept-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sept-. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “sept-,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/sept-.

Source: sept- on Wiktionary, CC BY-SA 4.0.