English

heptasyllable

From hepta- + syllable.

Proto-Indo-European *septḿ̥ ‘seven’

Proto-Hellenic *heptə́ ‘seven’

Ancient Greek ἑπτά ‘seven’

Proto-Hellenic *hlagʷ-

…

Latin syllaba

Old French sillebe

Anglo-Norman sillable

Middle English syllable

Today it means

noun line of verse with seven syllables

Language periods are conventional ranges, not dates for this word.

Etymograph / heptasyllable