Hepta is defined as seven.
(prefix)An example of the hepta prefix is a heptagon, a shape with seven sides.
See hepta- in Webster's New World College Dictionary
Origin: < Gr hepta, seven
See hepta- in American Heritage Dictionary 4
or hept-
prefixOrigin:
Origin: Greek
Origin: , from hepta, seven; see septm̥ in Indo-European roots
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