右葉 is read as うよう (uyou) and means right lobe.
うよう
uyou
うそく
right side
うせつ
turning to the right
みぎきき
right-handedness
みぎがわつうこう
driving on the right-hand side
うきょうのだいぶ
Ukyō no Daibu (title under the ritsuryō system)
みぎまわり
clockwise rotation
うき
aforementioned (statement)
うめん
みぎむき
facing right
みぎうち
hitting right-handed (with a racket, bat, etc.)
みぎよこがき
writing horizontally from right to left
みぎだしゃ
right-handed batter