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Webster 1913 Edition
Stemma
‖
Stem′ma
,Noun.
pl.
Stemmata
(#)
. [NL., fr. Gr. [GREEK], pl. [GREEK], a garland or chaplet.]
(Zool.)
(a)
One of the ocelli of an insect. See
Ocellus
. (b)
One of the facets of a compound eye of any arthropod.