This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A cell, tissue, or organ that produces a secretion.

n. A person whose saliva and other body fluids contain ABO antigens.

n. A person who or animal that secretes (emits a bodily fluid).

n. A person who secretes comparatively large quantities of blood-group antigens in their bodily fluids.

n. A cell, tissue or organ such as a gland, that produces a bodily secretion.

n. One who or that which secretes; specifically, a secreting organ: as, the silk-secretor of a spider.

n. any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream

"The FUT2 "secretor" gene encodes the fucosyltransferase that synthesizes the H antigen."

non-secretor   

organ   

silk gland    green gland    exocrine    sericterium    endocrine gland    serictery    duct gland    endocrine    exocrine gland    ductless gland