No, longitude is a meridian, not latitude.
equator
The Prime Meridian is made out of all the points at zero longitude and every latitude.
The prime meridian is at all latitudes.
The Prime Meridian is the line composed of all the points that havezero longitude and every possible latitude.
That would be the Prime Meridian.
Every point on a meridian has the same longitude.
Every meridian of longitude is perpendicular to every parallel of latitude, and every parallel of latitude is perpendicular to every meridian of longitude.
meridian
"parallels" of latitude
No. There's a point on the Prime Meridian at every possible latitude in existence.The only thing constant about the Prime Meridian, and its definition, is that everypoint on it has zero longitude.
The longitude of the Prime Meridian, by international definition and agreement, is zero (0°). .Every point on the Prime Meridian has a different latitude, and every latitude on Earthhas a point on the Prime Meridian.
The equator, at latitude zero.