1. The forehead or front part of the head in humans and animals.
Usage: anatomy; formal or technical
2. In insects, the front part of the head between the eyes and above the clypeus.
Usage: entomology; technical

Examples

• The frons of the insect specimen showed distinctive markings used for species identification.
• In anatomical diagrams, the frons is labeled as the region above the eyebrows.
• The entomologist examined the frons under a microscope to classify the beetle.
• Wrinkles on the frons become more pronounced with age.