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: H HÜ Hæ Hô H- H. H2 H< Ha Hb Hc Hd He Hf Hg Hh Hi Hl Hm Hn Ho Hp Hq Hr Hs Ht Hu Hw Hy Hz

Table of Contents POS
HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY

heptad

POS

Noun

HYPHEN

hep=tad

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WORDNET DICTIONARY

Noun heptad has 1 sense

heptad(n = noun.quantity) 7, septenary, septet, seven, sevener, vii - the cardinal number that is the sum of six and one; Array

is a kind of digit, figure

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CIDE DICTIONARY

heptad, n. [L. heptas the number seven. Gr. , , fr. "epta` seven.].

An atom which has a valence of seven, and which can be theoretically combined with, substituted for, or replaced by, seven monad atoms or radicals; as, iodine is a heptad in iodic acid. Also used as an adjective. [1913 Webster]

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OXFORD DICTIONARY

heptad, n. a group of seven.

Etymology

Gk heptas -ados set of seven (hepta)

For further exploring for "heptad" in Webster Dictionary Online