Definition of secretor in US English:

secretor

noun

Physiology
  • 1A cell, gland, or organ that secretes a substance.

    ‘the adrenal glands secrete hormones that regulate metabolism’
    1. 1.1 A person who secretes blood-group antigens (of the ABO system) in body fluids such as saliva and semen.
      ‘a person who is an ABH secretor will secrete antigens according to their blood group’

Pronunciation

secretor

/səˈkrēdər//səˈkridər/