lu·lav 
(l-läv, llôv′) Judaism
(l-läv, llôv′) Judaism n. pl. lu·lav·im (l-lä-vēm, -lôvĭm) or lu·lavs
1. A bundle containing a palm frond, two willow branches, and three myrtle branches that is ceremonially waved during the celebration of Sukkot.
2. The palm frond from such a bundle.
[Mishnaic Hebrew lûlāb, sprout, palm branch, from liblēb, to bloom; see lblb in the Appendix of Semitic roots.]