The type genus of the Liliaceae.

The plants of the genus Lilium are the true lily plants, comprising a genus of about 100 species in the lily family, Liliaceae. They are important as showy and large flowered garden plants, and in literature.

Lilium is the opening theme song for the anime Elfen Lied. It is based on several biblical passages and the hymn Ave mundi spes Maria (Hail Mary, Hope of the World) in Latin (and a couple of words in Greek). The lyric and melody are authored by Kayo Konishi and Yukio Kondou, after being requested to make the song like a Gregorian chant, and was performed by Kumiko Noma.