lin·e·a·tion 
(lĭn′ē-āshən)
(lĭn′ē-āshən)n.
1. The act of marking or outlining with lines.
2. An outline.
3. An arrangement of lines.
[Middle English lineacioun, from Latin līneātiō, līneātiōn-, from līneātus, past participle of līneāre, to make straight, from līnea, thread, line; see LINE1.]