se ‧ cre ‧ tion /sɪˈkriːʃ ə n/ BrE AmE noun
[ Date: 1600-1700 ; Language: French ; Origin: sécrétion , from Latin secretio 'separation' , from secretus ; ⇨ ↑ secret 1 ]
a) [uncountable and countable] a substance, usually liquid, produced by part of a plant or animal:
These secretions are used by the caterpillar as a defence.
b) [uncountable] the production of this substance:
the secretion of hormones by the pituitary gland