Non-linear

[lin-ee-er] /ˈlɪn i ər/

adjective
1.
of, consisting of, or using lines:
linear design.
2.
pertaining to or represented by lines:
linear dimensions.
3.
extended or arranged in a line:
a linear series.
4.
involving measurement in one dimension only; pertaining to length:
linear measure.
5.
of or relating to the characteristics of a work of art in which forms and rhythms are defined chiefly in terms of line.
6.
having the form of or resembling a line:
linear nebulae.
7.
Mathematics.

8.
Electronics. delivering an output that is directly proportional to the input:
a linear circuit; a linear amplifier.
9.
threadlike; narrow and elongated:
a linear leaf.
/ˈlɪnɪə/
adjective
1.
of, in, along, or relating to a line
2.
of or relating to length
3.
resembling, represented by, or consisting of a line or lines
4.
having one dimension
5.
designating a style in the arts, esp painting, that obtains its effects through line rather than colour or light and in which the edges of forms and planes are sharply defined Compare painterly
6.
(maths) of or relating to the first degree: a linear equation
7.
narrow and having parallel edges: a linear leaf
8.
(electronics)

adj.

also nonlinear, 1844, from non- + linear.
adj.

1640s, from French linéaire, from Latin linearis “belonging to a line,” from linea “string, line” (see line (n.)). Essentially the same word as lineal; “in Latin linearis the original suffix -alis was dissimilated to -aris, but in Late Latin this rule was no longer productive and the formation or re-formation in -alis remained unchanged.” [Barnhart]. Linear A and Linear B (1902-3) were names given to two related forms of linear Minoan writing discovered 1894-1901 in Crete by Sir Arthur Evans.

linear lin·e·ar (lĭn’ē-ər)
adj.
Of, relating to, or resembling a line; straight.
linear
(lĭn’ē-ər)
Being or resembling a line.