elegiac

adjective

1. Gr. & Latin Prosody of or composed in dactylic-hexameter couplets, the second line (sometimes called a pentameter) having only an accented syllable in the third and sixth feet: the form was used for elegies and various other lyric poems
2. of, like, or fit for an elegy
3. sad; mournful; plaintive

noun

1. an elegiac couplet
2. a series of such couplets; poem or poems written in such couplets