hepta-








  1. a combining form meaning “seven,” used in the formation of compound words: heptahedron.

combining form

  1. sevenheptameter

before vowels hept-, word-forming element meaning “seven,” from Greek hepta “seven” (see seven).

pref.

  1. Seven:heptameter.
  2. Containing seven atoms, molecules, or groups:heptane.
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