The act of one who lies, or keeps low to the ground.
An act of telling a lie or falsehood.
Tending to tell lies, untruthful, mendacious
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.
at or forming a right angle (to something).
Exactly upright; extending in a straight line toward the centre of the earth, etc.
Independent of or irrelevant to each other; orthogonal.