encephalin in British English
or encephaline (ɛnˈsɛfəˌliːn)
noun a variant of enkephalin
enkephalin in British English
or enkephaline (ɛnˈkɛfəlɪn), encephalin or encephaline (ɛnˈsɛfəlɪn)
nouna chemical occurring in the brain, having effects similar to those of morphine
See also endorphin