hexad

American  

[hek-sad] / ˈhɛk sæd /

noun

1. the number six.

2. a group or series of six.

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hexad British  

/ ˈhɛksæd /

noun

1. a group or series of six

2. the number or sum of six

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Other Word Forms

• hexadic adjective

Etymology

Origin of hexad

1650–60; < Late Latin hexad- (stem of hexas ) < Greek hexad- (stem of hexás ) unit of six, equivalent to héx six + -ad- -ad ¹

Example Sentences

No other element is here associated with the hexad axis, which is uniterminal.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

In this type of symmetry, of which apatite is the best example, there is only one plane of symmetry, which is perpendicular to the hexad axis.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" by Various

An element having a valence of one is a monad; of two, a dyad; three, a triad; four, tetrad; five, pentad; six, hexad, etc.

From An Introduction to Chemical Science by Williams, Rufus Phillips

The hexad axis is uniterminal and all the forms are open forms.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

Six dyad axes of two kinds are perpendicular to the hexad axis.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various