'Mesoseme' definitions:

Definition of 'Mesoseme'

From: GCIDE

Mesoseme \Mes"o*seme\, a. [Meso- + Gr. ? sign, mark; cf. F. m['e]sos[`e]me.] (Anat.) Having a medium orbital index; having orbits neither broad nor narrow; between megaseme and microseme. [1913 Webster]