枸橼

jǔ yuán

citron (Citrus medica)

grapefruit

枸

jǔ

used in 枸櫞|枸橼[ju3 yuan2]

橼

yuán

used in 枸櫞|枸橼[ju3 yuan2] and 香櫞|香橼[xiang1 yuan2]