I. adjective Date: 1854 anterior to or involving the anterior part of a frontal structure , II. noun Date: 1854 a ~ part (as a bone)
PREFRONTAL
Meaning of PREFRONTAL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012