Modifies a noun

• gland: Even in sheep, the pineal gland is directly affected by bright light.

• region: At the age of 2 1/2 years the patient developed a tumor in the pineal region.

• eye: A pineal eye detects dimming which speeds up swimming.

• cell: Between 20 - 30 % of pineal cells are magnetically sensitive.

• germinoma: Melatonin secretion was nearly absent in the patients with pineal germinoma regardless of treatment option, even in the patient who had been untreated.