What is the meaning of Lineal?

Pertaining to lines; consisting of lines.

Relating to aspects of lineage, such as descent, succession, inheritance or consanguinity.

In the direction of a line; measured or ascertained by a line.

Line-drawn; composed of lines.

Sans serif.

linear

a ruler

used to denote that someone or something is (too) straight, regular and regulated

linear

linear (long and narrow, with nearly parallel sides)

linear

linear

Source: wiktionary.org