linear -
–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 pertaining to the characteristics of a work of art in which forms and rhythms are defined chiefly in terms of line.
(lineal was used but not this one.. hope it is ok)