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Definition: Hadau'r planhigyn Linum usitatissimum (sef y planhigyn a elwir yn "flax" neu yn "linseed" yn Saesneg.)
Notes: Sylwer y defnyddir y term Saesneg "linseed" am y planhigyn ac am had y planhigyn. Mae angen gofal wrth gyfieithu i wirio pa ystyr yn union sydd o dan sylw.