octad

As a noun octad

is a group of eight things.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between octet and octad

is that octet is a group or set of eight of something while octad is a group of eight things.

As nouns the difference between octad and octal

is that octad is a group of eight things while octal is the number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7.

As an adjective octal is

concerning numbers expressed in octal or mathematical calculations performed using octal.

As an adverb ectad

is outward.

As a noun octad is

a group of eight things.

As nouns the difference between octad and octas

is that octad is a group of eight things while octas is .

As nouns the difference between octad and octa

is that octad is a group of eight things while octa is (meteorology) the fraction of the sky that is obscured by clouds, in eighths (one octa means that one eighth of the sky is obscured, two octas that one quarter is obscured, and so on).

As nouns the difference between octad and octan

is that octad is a group of eight things while octan is octane.

As nouns the difference between taxonomy and octad

is that taxonomy is the science or the technique used to make a classification while octad is a group of eight things.

Octad is a related term of octaeteris.

As nouns the difference between octad and octaeteris

is that octad is a group of eight things while octaeteris is an octennium, a period of eight (8) years (chiefly) in the ancient greek calendar or in reference to the short lunisolar cycle.