spermatotoxin

[ spur-mat-uh-tok-sin, spur-muh-tuh- ]
/ spɜrˌmæt əˈtɒk sɪn, ˈspɜr mə tə- /

noun

Also sper·ma·tox·in [spur-muh-tok-sin] /ˌspɜr məˈtɒk sɪn/.