Relating to or consisting of groups of seven; having the quality or characteristic of being arranged in sevens.
From Greek 'hepta' (seven) combined with the suffix '-ic' meaning having the quality of. This adjective form allows description of things organized by the number seven.
The heptadic structure appears in some traditional music and poetry—certain cultures use seven-beat patterns and seven-line stanzas that create specific rhythmic and poetic effects!
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