Microseme
Pronunciation : Mi"cro*seme
Part of Speech : a.
Etymology : [Micro- + Gr. micros?me.] (Anat.)
Definition : Defn: Having the orbital index relatively small; having the orbits broad transversely; -- opposed to Ant: megaseme.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder