Available from: http://www.allacronyms.com/_Medical/ABDO. MHRA 'ABDO', All Acronyms, 9 January 2018, <http://www.allacronyms.com/_Medical/ABDO> [accessed 9 January 2018] Bluebook All Acronyms, ABDO (Jan. 9, 2018, 3:01 AM), available at http://www.allacronyms.com/_Medical/ABDO. CSE All Acronyms. ABDO [Internet]; January 9, 2018 [cited 2018 JAN 9]. Available from: http://www.allacronyms.com/_Medical/ABDO.
There are several of these joints in the skull, examples include: Coronal Suture (between frontal and parietal bones); Lamboidal Suture (between the parietal and occipital bones); and Sagittal Suture (between the two parietal bones). These joints hold the bones of the skull together. Floor of the cranium, inferior to the frontal bone and anterior to the sphenoid. Non-technically: Centre of the face, behind the nose. Forms part of the nasal cavity and the orbits.
The next bone in line is going to be this one here occupying most of the area of the inferior view of the base of the skull. This is known as the occipital bone. And this is an unpaired bone covering the back of your head. It is convex externally as you can clearly see here on this image.