perpendicular

/ˌpɜː.pənˈdɪk.jə.lə(ɹ)/

noun

A line or plane that is perpendicular to another.
A device such as a plumb line that is used in making or marking a perpendicular line.
A meal eaten at a tavern bar while standing up.

adjective

At or forming a right angle (to something).
"In most houses, the walls are perpendicular to the floor."
Similar: normal, orthogonal
Exactly upright; extending in a straight line toward the centre of the earth, etc.
Independent of or irrelevant to each other; orthogonal.

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