DIADROM, d[=i]'a-drom, _n._ a course or passing: a vibration. [Gr.]

DIÆRESIS, DIERESIS, d[=i]-[=e]r'e-sis, _n._ a mark (¨) placed over one of

two vowels to show that each is to be pronounced separately, as

_aërial_:--_pl._ DIÆR'ESES, DIER'ESES. [Gr.,--_dia_, apart, _hairein_, to

take.]