The headword, a nominative plural, is presumably quoted from somewhere; perhaps Josephus, Jewish Antiquities 3.9, though the glossing implies other contexts as well or instead.
[1] See also Etymologicum Genuinum, and Etymologicum Magnum 806.24. The first of these reads di/froi ("chariots" or "seats") for the Suda's di/frioi ("[things] of a chariot"). The quotation which follows the gloss clearly pertains to chariots, but di/froi is perhaps to be preferred as xamai/zhloi is also a word for low stools. See also Erotion 94.7.
[2] Quotation (transmitted, in Adler's view, via the Excerpta Constantini Porphyrogeniti) unidentifiable; lacking, Adler reports, in ms F (Laurentianus 55.1)