Heptads

Part of speech: noun

Definitions

1. A group or set of seven entities, often used in contexts such as music, mathematics, or classifications
2. Denoting a collection or sequence that comprises seven individual members or units
3. Referring to structures or phenomena that are organized or occur in groups of seven

Etymology: "Heptads" is the plural of "heptad", a noun for a group of seven or a structure built around seven parts. The word is built from "hepta-", the combining form of the Greek "heptá", meaning "seven", which also appears in "heptagon" (a seven-sided figure) and "heptathlon" (a seven-event contest). The second element, "-ad", comes from Greek "-as" (genitive "-ados"), a suffix used to form nouns denoting a unit or a set, as in "triad", "monad" and "dyad". Because "-ad" is the same ending found in those older terms, "heptad" follows a familiar pattern: a number prefix combined with "-ad" to name a grouping of that many items. Its plural simply adds "-s" in the usual way, so "heptads" refers to several such groups or structures at once.

Synonyms: sevens