elegy
n.,
pl. 3gies 5Fr =l=gie < L elegia < Gr elegeia < elegos, a lament < ? IE base *el3 > ALMS6
1 any poem in elegiac verse
2 a poem or song of lament and praise for the dead, as Shelley‘s “Adonais”
3 any poem, song, etc. in a mournfully contemplative tone !Gray‘s “Elegy Written in a Country Churchyard”"

elegiac
adj.
5LL elegiacus < Gr elegeiakos < elegeia: see ELEGY6
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 Also el[e[gi[a[cal 7el#! jj4! k!l8
n.
1 an elegiac couplet
2 [pl.] a series of such couplets; poem or poems written in such couplets

prosody
n.,
pl. 3dies 5ME prosodye < L prosodia < Gr prosbidia, tone, accent, song sung to music < pros, to + bidc, song: see ODE6
1 the science or art of versification, including the study of metrical structure, stanza forms, etc.
2 a particular system or style of versification and metrical structure !Dryden‘s prosody"