secretion

Từ điển American Heritage Dictionary 4th

I. se·cre·tion¹ (sĭ-krēʹshən)n.
1. The process of secreting a substance, especially one that is not a waste, from the blood or cells:
secretion of hormones; secretion of milk by the mammary glands.
2. A substance, such as saliva, mucus, tears, bile, or a hormone, that is secreted. [French sécrétion, from Old French, separation, from Latin sēcrētiō, sēcrētiōn-, from sēcrētus, past participle of sēcernere, to set aside. See secern.] se·creʹtion·ar'y (-shə-nĕr'ē) adj. II. se·cre·tion² (sĭ-krēʹshən)n.
1. The act of concealing something in a hiding place.
2. The act of stealing something secretly. [From secrete².]