os infraorbitale

(plural ossa infraorbitalia))

infraorbital bone (one of a series of dermal bones generally below the eye. Name applied to the first six circumorbital bones: infraorbital 1 (lachrymal or preorbital), infraorbital 2 (jugal), infraorbital 3 (true postorbital), infraorbitals 4 and 5, and infraorbital 6 (dermosphenotic). Associated with the infraorbital lateral line. Suborbital bones, q.v., are recognised by some authors as a separate series, sometimes used as a synonym for infraorbital)