Parent, Host, and Main Sequence star nomenclature - and a suggestion

While narrating in my video log 'while doing deep space exploration, I keep wondering how to describe, or name, the (what I call) "Parent Star" - the one about which all other bodies, including secondary stars, in the system orbit. For example, when looking at the system map 'where there are several main sequence stars in the system, I've been calling the largest primary star (about which all other objects orbit) the "PARENT" star, while usually referring to the lesser stars that orbit it (many of which that have planets orbiting them) as "HOST" stars. How do you refer to the stars in such a hierarchy?
I would just like to know.

Also..
As a suggestion - the system map always shows planetary-body distances relative to the main "PARENT" star, and not relative to their nearest stellar "HOST".
It's therefor not obvious how to determine if the bodies orbiting the host are within it's habitable zone.
Perhaps you should include distances to the nearest host for the bodies orbiting it in these secondary systems, somewhere in the system map?
Just a suggestion.
 
Centre of mass of the system
Parent body (they are always a star in ED so parent star is fine too)
Primary
Barycentre

I'm not sure 'host' would work.

The distances shown are relative to the barycentre - the centre of mass of the complete system. A 'system' is a set of gravitationally tightly bound bodies, or objects. in ED there is no simulation of gravitational influence between systems, so each system is a complete model.

hth.
 
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