octad octad octadecanoic acid octadic octads octaemeron octagon octagon octagonal octagonally
| octagons octagynous octahedra octahedral octahedral octahedrally (current term) octahedrite octahedron octahedron octahedrons
| octal octals octal digit octal notation octal number system octal numeration system octamerous octamer binding protein octamer motif octameter
|