Today I added a word to my vocabulary which is best described with a riddle:
Born during the second's reign whose life ended to the lance
For centuries I was used to transport mail or dress for any circumstance
I was reborn anew from an egg's observation for a rhyme yet unraveled
To help a girl born from song, not sung, during her odyssey untraveled
Monosyllabic, I am not, for I am comprised of three
A wine, a beau, then a sequel too are what my sounds should be
What word did I learn today?
Update: Lines 5 & 6 added as an additional hint