Stemma :: Stemma (n.) One of the ocelli of an insect. See Ocellus.
Stemmed :: Stem (v. t.) To ram, as clay, into a blasting hole..
Stemmer :: Stemma (n.) One of the facets of a compound eye of any arthropod.
Stemmery :: Stemmer (n.) One who, or that which, stems (in any of the senses of the verbs)..
Stemmy :: Stemmery (n.) A large building in which tobacco is stemmed.