Word.ws English Dictionary

sept-

sept- prefix: seven: forming words relating to seven.

Prefix

sept-

  1. Seven: forming words relating to seven.
  2. Used 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”)

Origin of sept-

From Latin septem (“seven”).

Questions about sept-

What does sept- mean?
Sept- means seven: forming words relating to seven.
What part of speech is sept-?
Sept- is a prefix.

Words near sept- in the dictionary

  1. sepsids
  2. sepsin
  3. sepsins
  4. sepsis
  5. sept
  6. sept-
  7. Sept-Îles
  8. Sept.
  9. septa
  10. septa-
  11. septadentate

Source and license

Adapted from Wiktionary: sept- (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “sept-.” Word.ws, https://word.ws/sept-. Based on Wiktionary, CC BY-SA 4.0.