Citrus fruits (a group that includes mandarins, lemons, oranges, etc.), often high in vitamin C.
冬になると柑橘類が店頭に多く並ぶ。
In winter, many citrus fruits appear in stores.
柑橘類の皮は料理や掃除にも使える。
Citrus peels can be used in cooking and cleaning.
彼は柑橘類アレルギーがあるのでレモンは食べられない。
He has an allergy to citrus fruits, so he can't eat lemons.