Bible Encyclopedias
Heptad
The Nuttall Encyclopedia
A term in chemistry to denote an atom that is the equivalent of seven atoms of hydrogen, from hepta , seven.
Copyright Statement
Public Domain.
Bibliography Information
Wood, James, ed. Entry for 'Heptad'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/h/heptad.html. Frederick Warne & Co Ltd. London. 1900.