We don't have synonyms for rhaphe yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are raphe and rhaphy.
(n) :
(botany) Alternative form of raphe. [(anatomy) A seamlike ridge or furrow on an organ, bodily tissue, or other structure, typically marking the line where two halves or sections fused in the embryo.]
(n) :
(botany) Alternative form of raphe. [(anatomy) A seamlike ridge or furrow on an organ, bodily tissue, or other structure, typically marking the line where two halves or sections fused in the embryo.]