English dictionary: words starting with oct

abbreviation

Octavo.

combining form

Variant spelling of octa- and octo- assimilated before a vowel (as in octennial ).

Written abbreviation for october

noun

A series of eight notes, as the ordinary diatonic scale.

adjective

Having eight rays; specifically of or relating to the subclass octocorallia (formerly called octactiniae) of anthozoan corals whose polyps bear eight pinnate tentacles.

noun

An anthozoan coral of the subclass octocoralliae (formerly called octactinia) whose polyps bear eight pinnate tentacles.

noun

A group or set of eight.

Usage examples:

After meiosis, the four meiotic products undergo an additional mitotic division to yield eight hapl…

noun

Any of the series of saturated hydrocarbons (alkanes) having the formula c₁₈ h₃₈; specifically (also "n-octadecane") the unbranched isomer ch₃ (ch₂)₁₆ ch₃.

noun

Any of the series of hydrocarbon radicals —c₁₈ h₃₇ derived from the octadecanes; specifically the straight-chain radical —ch₂ (ch₂)₁₆ ch₃ (also called stearyl). usually attributive or a formative element in chemical names.

adjective

Of or relating to an octad or octads. "octadic surface" noun geometry a quartic surface having eight nodes which can be thought of as the intersections of three quadric surfaces.

noun

An ancient greek coin worth eight drachmas.

noun

An ancient greek coin worth eight drachmas.

noun

A group or set of eight.

Usage examples:

After meiosis, the four meiotic products undergo an additional mitotic division to yield eight hapl…

noun

In the ancient greek calendar: a period of eight years, in the course of which three months of 30 days each were intercalated so as to make the year of 12 lunar months correspond with the solar year.

noun

A plane figure with eight straight sides and eight angles.

Usage examples:

You may know about a pentagon, a hexagon, or an octagon.

adjective

Having the shape or cross section of an octagon; eight-sided.

Usage examples:

An octagonal tower

noun

A plane figure with eight straight sides and eight angles.

Usage examples:

You may know about a pentagon, a hexagon, or an octagon.

noun

A three-dimensional shape having eight plane faces, especially a regular solid figure with eight equal triangular faces.

Usage examples:

These are often known as the platonic solids: the tetrahedron, cube, octahedron, dodecahedron and i…

Plural of octahedron specialized

adverb

In an octahedral shape or arrangement; with octahedral symmetry.

adjective

Octahedral.

noun

A three-dimensional shape having eight plane faces, especially a regular solid figure with eight equal triangular faces.

Usage examples:

These are often known as the platonic solids: the tetrahedron, cube, octahedron, dodecahedron and i…

noun

A three-dimensional shape having eight plane faces, especially a regular solid figure with eight equal triangular faces.

Usage examples:

These are often known as the platonic solids: the tetrahedron, cube, octahedron, dodecahedron and i…

noun

A solid figure having forty-eight scalene triangular faces.

adjective

Relating to or using a system of numerical notation that has 8 rather than 10 as a base.

Usage examples:

Then convert each of these groups into one octal digit.

noun

The octal system; octal notation.

Usage examples:

The calculation should be done in binary or octal

adjective

Having parts arranged in groups of eight.

Usage examples:

Being octocorallians, they have polyps that show an octamerous or eight-fold symmetry.

noun

A line of verse consisting of eight metrical feet.

Usage examples:

Really the only difference is that the terms have been carrollised and the verse is in octameter in…

noun

A colourless flammable hydrocarbon of the alkane series, present in petroleum spirit.

Usage examples:

Carbon in its most reduced form is found in alkanes, which are typically fuels like methane, propan…