ὑποδια-στολή · hypodia-stolē — LSJ
slight stop
slight stop, between words in speaking or reading, Quint. Inst. 11.3.35.
II mark to divide words from one another
mark to divide words from one another (most Greek writing being continuous), e. g. ἔστιν, ἄξιος to distinguish it from ἔστι Νάξιος, Ps.-D.T. 674 (1.1.114 Uhlig), Sch. D.T. p.24H., al., Eust. 701.56, 1465.16.
III slight change
slight change in positions of the planets, Vett.Val. 73.17.