prime meridian.
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.
Longitudinal... No, the particles move transverse to the wave direction. And that they are in 2 perpendicular surfaces, which are intersected in a line, and that line is the base line of the 2 direction waves.
distance from east to west
Ependyma
Pennate.
a sand dune that goes on in a long line
prime meridian
Central meridian is a line on a map. It begins with the letter c.
central Canal
Longitudinal.