HEPTADS

Noun

heptads

plural of heptad

Anagrams

• T-shaped, spathed

Source: Wiktionary

HEPTAD

Hep"tad, n. Etym: [L. heptas the number seven. Gr. "epta` seven.] (Chem.)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition