180 degrees is a straight line
The central line is the middle line on which the shape is reflected on
greenich meantime
The croquet start line is called a baulk line.
A circle.
line of longitude. Or a longitudinal line.
meridian
That line is the most central line and is called the Circle Line.Operating round the central of London it's a surprise it isn't called the Central Line.But there is a Central Line, and a section of it runs just north of Westminster.
distance from east to west
The equator.
Ependyma
The high pressure region of a longitudinal wave is called compression.
a sand dune that goes on in a long line
prime meridian
This type of wave is called a longitudinal wave. In a longitudinal wave, the particles of the medium vibrate parallel to the direction of the wave propagation. Sound waves are an example of longitudinal waves.
Central meridian is a line on a map. It begins with the letter c.
Longitudinal waves have particles of the medium that move parallel to the direction of the wave. This type of wave is characterized by compressions and rarefactions where the particles oscillate back and forth along the direction of energy transfer. Sound waves are an example of longitudinal waves.