octad
Group of eight
An octad is a group or set of eight.
The term appears in technical and scientific contexts—chemistry, music theory, mathematics—where precise numerical groupings matter: The octad of electrons forms a stable configuration.
More literary than everyday; most speakers would say "group of eight."
Number after seven
- eightfoldBy a factor of eight
- decadeTen-year span
- monadIndivisible fundamental unit
- dyadTwo forming one
triad · tetrad · pentad · hexad · heptad · numerical · grouping · mystical
eight
Number after seven
dyad · triad · tetrad · pentad · hexad · heptad · numerical · grouping · mystical · gnostic
ensemble
Unified group or outfit
- collectiveJointly organized group
- assemblyConstructing from components
- clusterGathered group nearby
gathering · congregation · crew · team · squad · band · pack · bunch · company · set
element
Basic substance or factor
shell · configuration · orbital · stability · bonding · atom · molecule · compound · oxidation · ionic
- giant octopusOversized eight-limbed sea creature
- high octaneIntensely energetic or powerful
- October surpriseLast-minute campaign revelation
- blue-ringed octopusLethal spotted sea creature
- octane ratingFuel's anti-knock measurement
- Doctor Octopus
octopus, October, octagon, octave, octane, octagonal, octet, octahedron, octahedral