stemma

(noun) a tree diagram showing a reconstruction of the transmission of manuscripts of a literary work.

(noun) the descendants of one individual. Synonyms: lineage, line, line of descent, descent, bloodline, blood line, blood, pedigree, ancestry, origin, parentage, stock. Examples: "His entire lineage has been warriors."

(noun) an eye having a single lens. Synonyms: simple eye, ocellus.