The Collaborative International Dictionary
libelluloid
libelluloid \li*bel"lu*loid\ (l[-i]*b[e^]l"l[-u]*loid), a. [NL. Libellula, the name of the typical genus + -oid.] (Zo["o]l.) Like or pertaining to the dragon flies.
Wiktionary
libelluloid
a. (context entomology English) Like or pertaining to the dragonfly.