Stemma
Pronunciation : Stem"ma
Part of Speech : n.;
Etymology : [NL., fr. Gr. (Zo?l.) (a) One of the ocelli of an insect. See Ocellus. (b) One of the facets of a compound eye of any arthropod.
Definition :
pl. Stemmata.
Source : Webster's Unabridged Dictionary, 1913