The pituitary gland or hypophysis; an endocrine gland at the base of the brain that regulates growth and metabolism.

(bound form) front; forward; ahead; facing direction. Use 前边 qián​bian or 前面 qián​miàn for the standalone noun.

leaf of a plant; foliage; something resembling a leaf, such as a lobe of a lung or a shutter blade