linear
lin-e-ar
adjective
Arranged in a straight line, or progressing sequentially from one stage to the next.
"The story followed a linear timeline."
Thesaurus
Synonyms: unsubdivided, simple, elongate, one-dimensional, lineal, rectilinear, linelike, rectilineal, collinear, analog, analogue, additive
Antonyms: cubic, digital, nonlinear, planar, three-dimensional, two-dimensional