scotophobin

[ skoh-tuh-foh-bin ]
/ ˌskoʊ təˈfoʊ bɪn /

noun

a peptide isolated from the brains of rats conditioned to avoid darkness, alleged to induce a dark-avoidance response in untrained rats, mice, and other animals.

OTHER WORDS FROM scotophobin

sco·to·pho·bic, adjective