heptagonal, -e, adj., heptagonal.
heptagone, n.m. and adj., heptagon; heptagonal.
heptaméron, n.m., heptameron.
heptandre, adj., heptandrian.
heptandrie, n.f., heptandria.
heptangulaire, adj., heptangular.
heptaphylle, adj., (bot.) heptaphyllous.
heptarchie, n.f., heptarchy.
heptarchique, adj., heptarchic.
héraldique, adj., heraldic.