ブラウザの設定でJava Scriptの使用を有効にしてご利用ください。
出典:Wiktionary
From frontō (“person with a large forehead”), from frons (“forehead”) + -ō (“forming related nouns”).
Frontō m sg (genitive Frontōnis); third declension
Third-declension noun, singular only.
From frontal + -o-.
fronto-
front o