Dyad [noun]

Some Dyad was then produced, which the respondent did not know to be a Dyad; accordingly he did not know it to be even.

The respondent was asked, Do you know that every Dyad is even?

When you say a line, do you mean a dyad in length Form in Matter?

Two, or the dyad, is the origin of contrasts and separation, and is an evil principle.

What is to become two, must partake of the Dyad: what is to become one, of the Monad.

For either the dyad is not One; or else the monads included therein are not monads ἐντελεχείᾳ (a. 14).

In figure 130 one lagging chromosome shows the dyad nature of the products of the division of the tetrad.

Here there is only one dyad axis in which two planes of symmetry intersect.

They are parallel to the edges of the cube, and in the different classes coincide either with tetrad or dyad axes of symmetry.

Here there is a single plane of symmetry perpendicular to which is a dyad axis; there is also a centre of symmetry.