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.
n.seven, VII, sevener, septet, septenary, digit generic term, figure generic term
Vogais: ea
Consoantes: hptd
heptade, heaped, heaved, hebetated, hefted, hip pad, hypatia, heft, hebetate, hebetude.