ˈlepˌtēn adjective
also lep·ten·ic (ˈ)lep|tenik
Etymology: leptene from German lepten, from lept- + -en (as in German euryen euryene); leptenic from leptene + -ic — more at euryene
: having a high, a narrow, or a high narrow forehead with an upper facial index of 55 to 60 on the skull and of 53 to 57 on the living