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WordNet (r) 3.0 (2006) (WordNet)

stemma
n 1: a tree diagram showing a reconstruction of the transmission
of manuscripts of a literary work
2: the descendants of one individual; "his entire lineage has
been warriors" [synonym: {lineage}, {line}, {line of descent},
{descent}, {bloodline}, {blood line}, {blood}, {pedigree},
{ancestry}, {origin}, {parentage}, {stemma}, {stock}]
3: an eye having a single lens [synonym: {simple eye}, {stemma},
{ocellus}]