Crosswords Solver

Answer: endorphin
Answer	Crossword Clue
endorphin	any of a group of peptides occurring in the brain and other tissues of vertebrates, and resembling opiates, that react with the brain's opiate receptors to raise the pain threshold
endorphin	any of a group of peptides that occur in the brain and bind to the same receptors as morphine, thereby inhibiting pain

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.

Answer: endorphin