Main Entry: be·ta–en·dor·phin

Variant(s): or β–endorphin \ˌbāt-ə-en-ˈdȯr-fən, chiefly British ˌbē-tə-\

Function: noun

: an endorphin of the pituitary gland with much greater analgesic potency than morphine that occurs free and as the terminal sequence of 31 amino acids in the polypeptide chain of beta-lipotropin