On affix form:

solri
x1 is the sun of home planet x2 (default Earth) of race x3; (adjective:) x1 is solar.

In definition:

arde
x1 is the planet Earth, Sol III
belta'em
the Main (Asteroid) Belt of the Sol system
beltakaiper
the Kuiper belt of Sol system
belta'ort
the Oepik-Oort Cloud of Sol system.
laxtyminli
x1 is x2 (li; default: 1) galactic units (i.e.: the average distance between the center of the Milky Way galaxy and the center of Sol system) by standard x3.
remsol
Name: The Sun / Sol
solcist
the Solar System (notice: proper noun); Sol system.

In notes:

mocrlagranje
x1 is the x2 (designation) Lagrange point for orbital system x3 under coordinate-determining convention and naming convention and calculation method x4.