orbis, = a ring, round surface, disk, hoop, orbit, orb, a circle;
(ring, circle, orb)
-eus, = indicates material or colour or resemblance in quality.
(probably a reference to the well developed annulus) (ld, BL, Le)
varius, = (of colour), variegated, partly-coloured, mottled;
-atus, = indicates possession or likeness.
variego, = to make of various sorts or colours, to variegate; to be party-coloured or variegared. (ld, BL)