The Collaborative International Dictionary of English v.0.48:

Melilite \Mel"i*lite\ (m[e^]l"[i^]*l[imac]t), n. [Gr. me`li
   honey + -lite; cf. F. m['e]lilithe.] (Min.)
   A mineral occurring in small yellow crystals, found in the
   lavas (melilite basalt) of Vesuvius, and elsewhere. [Written
   also mellilite.]
   [1913 Webster]