frons
/frɒnz/
noun
Zoology
The forehead or equivalent part of an animal, especially the middle part of an insect's face between the eyes and above the clypeus.
Origin
Mid 19th century: from Latin, ‘front, forehead’.
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Franz had a prominent frons, not helped by the fact he was losing hair from the front to back. In spite of his prominence, he rarely committed any effrontery.