It means you have bruised it.
Not always
Do you mean, like, the Earth? The equator. If you mean the line going from side to side across the middle of a circle then... the diameter of a circle
If there is a red line moving across your arm, it might mean you were bitten by something and it gave you an infection. The red line is your tendon swelling. See a doctor immediatley
when it is a parallel line across the x and y axis
What it means is horizontal line is like the horizon it goes across
It refers to the reflection of an object across some line.
it means that the nail has grown into your skin at the side of your toe.
I assume you mean black iron pipe, which is used to run the gas line to your furnace.
It will be the wire without the black line on it. Usualy the black line on a solid color will mean negative (-)
I assume you mean black iron pipe, which is used to run the gas line to your furnace.
an oblique or diagonal line of direction, esp. across a woven fabric.
A Pink Elephant is when the next person in line for Handball runs across the wall. If they get hit then they have to go to the back of the line.