The Collaborative International Dictionary of English v.0.48:

Lemuroidea \Lem`u*roi"de*a\ (l[e^]m`[-u]*roi"d[-e]*[.a]), n. pl.
   [NL. See Lemur, and -oid.] (Zool.)
   A suborder of primates, including the lemurs, the aye-aye,
   and allied species. [Written also Lemuroida.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

Lemuroidea
    n 1: Lemuridae; Lorisidae; Daubentoniidae; Indriidae; used in
         some classifications instead of Prosimii; in others
         considered a subdivision of Prosimii [syn: Lemuroidea,
         suborder Lemuroidea]