From prosody, the term diaeresis comes up when reading Greek and Latin poetry, including the Greek tragedies,
    the epics of Homer, and the Aeneid, by Vergil. A diaeresis is a pause between one metron and the next, at the
    end of a word, generally marked with two vertical lines. Diaeresis is distinguished from a caesura (both of which
    mark word ends) by where it lies in the line of poetry. The diaeresis comes between feet; whereas the caesura
    comes within a metrical foot and, unlike a caesura, a diaeresis doesn't necessarily represent a pause in the
    sense of the words.
    From the Greek diairein = to divide or tear away.

    Pronunciation: di-aer'-e-sis • (noun)

    Examples: In the opening line of Vergil's Aeneid, the diaeresis precedes the last two metrical feet: primus ab
    oris; whereas the caesura comes after cano:
    Arma virumque cano, Troiae qui primus ab oris
    (Arms and the man I sing, the first who from the Trojan shore)
Diaeresis
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