It's called a "Horizontal Rule"... the HTML for that would be <HR>
The term horizontal deflection refers to how much something deviates from the horizontal line.
Yes, it is. Think of the horizon. A horizontal line is parallel to the horizon.
An asymptote.
The coefficient of x is 0 in the equation of line (The x term is missing).Equation of a horizontal line is of the type y=constant.For eg: y=3, y=-1 etc.
I suppose they could be called a pair, just like two horizontal lines could be called a pair, but it's not a "mathematical" or "technical" term.
Horizontal federalism is a term used to refer to the different ways that state governments relate to one another.
Ever hear of the term horizon. A long line going across like the horizon.----- so a horizontal angle would be like that.
An air level is another term for a spirit level, a tool with a chamber containing a coloured liquid and an air bubble, used to determine a horizontal or vertical reference line.
papakole (horizontal lines above both a), 'elemu (horizontal line above the first e), or 'okole (horizontal line abovec the first o, this term is much more crass and impolite)
Horizontal Gene Transfer is probably the term you are looking for
meridians
vanishing point