The vomer bone is a thin, flat bone that forms part of the separation between the nasal passages. This bone divides the nostrils and appears in the skull of most vertebrates.
This bone is trapezoidal, or plow-shaped, and has two surfaces and four borders, all of which are part of the nasal septum. The vomer bones articulates along with the sphenoid, ethmoid, two maxillae and two palatine bones.
According to Anatomy Expert, he word "vomer" is of Latin origin and means "a plowshare." It is thought to arise from the Latin word "vomere," meaning "to vomit." A plow throws, or vomits, dirt and soil to the side.