frons

frons (noun; plural frontes; Latin frons, fore part of anything, face): 1. (Arthropoda: Insecta) The head sclerite bounded by the postfrontal suture dorsally and the epistomal suture ventrally; the frons is delimited in various ways by different authors and in different insects and stages

See also: front, facies. 2. (Sipuncula) see cerebral organs, digitate processes.