I am interpreting the single letter before the Greek word as a learning device. When I learned English "A" was for "apple", "B" was for "bear" etc. Also, look at the notes included in the first lesson for help downloading a Greek keyboard to your computer.
The team has posted a lot more on resources in the Greek forums at https://forum.duolingo.com/topic/936 .
Check the lesson notes for assistance downloading a Greek keyboard for your device.
When I use google translate I get:
Translations of Ιλιάδα NounFrequency Iliad Ιλιάδα, Ιλιάς
and this from "Glosbe"
Ιλιάδα in English translation and definition "Ιλιάδα", Greek-English Dictionary online add translation
ancient Greek epic poem about the Trojan War
One of two ancient Greek epic poems attributed to Homer. The poem concerns events during the tenth and final year in the siege of the city of Troy.
There are also example sentences.
Σαν την Ιλιάδα, οι ιστορίες σας θα συνεχίσουν να ζουν για πάντα. Like the Iliad, your stories will live on forever.
Also, try this site with 7 dictionaries together.
And instead of spending time look around for answers make use of the assistance given to you by Duolingo.
TIPS TO HELP YOU LEARN + HOW TO REPORT A PROBLEM
And check out the Greek Forum here with more links.