Adj. | 1. | octal - of or pertaining to a number system having 8 as its base; "an octal digit" |

(mathematics) | octal - Base 8. A number representation using the
digits 0-7 only, with the right-most digit counting ones, the
next counting multiples of 8, then 8^2 = 64, etc. For
example, octal 177 is digital 127:digit weight value 1 8^2 = 64 1* 64 = 64 7 8^1 = 8 7* 8 = 56 7 8^0 = 1 7* 1 = 7 --- 127 Octal system used to be widespread back when many computers used 6-bit bytes, as a 6-bit byte can be conveniently written as a two-digit octal number. Since nowadays a byte is almost always 8-bit long the octal system lost most of its appeal to the hexadecimal system. For a brief discussion on the word `octal' see hexadecimal. |

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Oct

Octa-

Octachord

Octad

octadecanoic acid

Octaedral

Octaemeron

Octagon

octagonal

Octagynous

Octahedral

Octahedral borax

Octahedral cleavage

Octahedral iron ore

Octahedrite

Octahedron

**-- octal --**

octal digit

octal forty

octal notation

octal number system

octal numeration system

Octamerous

Octameter

octander

Octandria

octandrian

octane

octane number

octane rating

octanedioic acid

Octangular

Octans

Octa-

Octachord

Octad

octadecanoic acid

Octaedral

Octaemeron

Octagon

octagonal

Octagynous

Octahedral

Octahedral borax

Octahedral cleavage

Octahedral iron ore

Octahedrite

Octahedron

octal digit

octal forty

octal notation

octal number system

octal numeration system

Octamerous

Octameter

octander

Octandria

octandrian

octane

octane number

octane rating

octanedioic acid

Octangular

Octans