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Like a line; narrow; of the same breadth throughout, except at the extremities; as, a linear leaf. Linear differential (Math.), an equation which is of the first degree, when the expression which is equated to zero is regarded as a function of the dependent variable and its differential coefficients. -- Linear equatio…

Of a linear shape.

Having the form of a sword, but very long and narrow.

In a linear manner; with lines.

Linear. Holland.

Of, pertaining to, or included by, two lines; as, bilinear coördinates.

Consisting of, or bounded by, curved lines; as, a curvilinear figure.

The state of being curvilinear or of being bounded by curved lines.

In a curvilinear manner.

nserted between lines already written or printed; containing interlineations; as, an interlinear manuscript, translation, etc. -- In`ter*lin"e*ar*ly, adv.

Interlinear. -- n.

or consisting of, lines of different kinds, as straight, curved, and the like; as, a mixtilinear angle, that is, an angle contained by a straight line and a curve. [R.]

Of or pertaining to an outline; being in, or forming, an outline. Trench.

ing of a straight line or lines; bounded by straight lines; as, a rectineal angle; a rectilinear figure or course. -- Rec`ti*lin"e*al*ly, adv. -- Rec`ti*lin"e*ar*ly, adv.

The quality or state of being rectilinear. Coleridge.

Of, pertaining to, or included by, three lines; as, trilinear coördinates.

Straight; rectilinear. [R.]

initely extended, would never meet it. Asymptotes may be straight lines or curves. A rectilinear asymptote may be conceived as a tangent to the curve at an infinite distance.

Cleft to the middle or slightly beyond the middle; opening with a cleft; divided by a linear sinus, with straight margins.

or curved; a curving or bending, normal or abnormal, as of a line or surface from a rectilinear direction; a bend; a curve. Cowper. The elegant curvature of their fronds. Darwin.