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Disposition; arrangement; order. [R.] Angle of ordination (Geom.), the angle between the axes of coördinates.

Origin; commencement; source. It hath it original from much grief. Shak. And spangled heavens, a shining frame, Their great Original proclaim. Addison.

That point in which the three perpendiculars let fall from the angles of a triangle upon the opposite sides, or the sides produced, mutually intersect.

potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See Feldspar.

Breaking in directions at right angles to each other; -- said of the monoclinic feldspars.

The diagonal or lateral axis in a monoclinic crystal which is at right angles with the vertical axis.

Right-angled; rectangular; as, an orthogonal intersection of one curve with another. Orthogonal projection. See under Orthographic.

Perpendicularly; at right angles; as, a curve cuts a set of curves orthogonally.

Of or pertaining to right lines or angles. Orthographic or Orthogonal, projection, that projection which is made by drawing lines, from every point to be projected, perpendicular to the plane of projection. Such a projection of the sphere represents its circles as seen in perspective by an eye supposed to be placed at…

Having the axes at right angles to one another; -- said of crystals or crystalline forms.

Having the right form. Orthomorphic projection, a projection in which the angles in the figure to be projected are equal to the corresponding angles in the projected figure.

Noting the system of crystallization which has three unequal axes at right angles to each other; trimetric. See Crystallization.

Cutting at right angles. Orthotomic circle (Geom.), that circle which cuts three given circles at right angles.

Having two cleavages at right angles with one another.

The property of cutting at right angles.

An instrument for measuring the angle through which a ship rolls or pitches at sea.

A place or space outside of something; a nook or corner; an angle projecting outward; an open space; -- chiefly used in the phrase ins and outs; as, the ins and outs of a question. See under In.

To disentangle. [Obs.]

A triangle having three acute angles.

Having acute angles. Barlow.