base line

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or·bi·to·mea·tal plane

1. a line approximating the base of the cranium, passing from the infraorbital ridge to the midline of the occiput, intersecting the superior margin of the external auditory meatus; the cranium is in the anatomic position when the base line lies in the horizontal plane and right and left sides are level.
2. a standard craniometric reference plane passing through the right and left porion and the left orbitale; drawn on the profile radiograph or photograph from the superior margin of the acoustic meatus to the orbitale.
Farlex Partner Medical Dictionary © Farlex 2012

base line

An imaginary cephalometric line from the infraorbital ridge through the middle of the external auditory meatus to midline of occiput.
See also: line
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
State of the art and present developments of a general concept for GPS-based height determination, in Proceedings of the First Workshop on GPS and Mathematical Geodesy in Tanzania (Kilimanjaro Expedition 1999).
The supports of the Section of the Geodynamics of the Committee of Geodesy, Polish Academy of Sciences and the Ministry of Education, Youth and Sport of the Czech Republic (Centre for Earth's Dynamic Research--project LC506) are highly appreciated and acknowledged.
This is apart from classical hard copy--and believe me, there will always be a requirement for hard-copy mapping, charting, geodesy imagery products, particularly in the combat arms.
Whatever your opinion, Morpheous assures us that the Geodesy Plus is legal in the UK.
Almost 12,000 examples of GEODESY have now been sold, but they're not cheap - a standard GEODESY device now costs pounds 350.
It's called the Geodesy and is a GPS satellite unit you just plonk into your cigarette lighter and stick in your dashboard.
The makers of the Geodesy stress that it isn't a radar device but rather a Global Positioning Satellite system that alerts a driver to an approaching, electronically-mapped speed trap.
Carl Zeiss Jena's ability to compete in the geodesy market will be strengthened.
The scientists described their findings at a July meeting of the International Union of Geodesy and Geophysics in Birmingham, England, and in the July 27 Eos.
The National Institute of Geophysics, Geodesy and Geography at the Bulgarian Academy of Sciences stated that the earthquake was registered in the territory of Turkey at about 20.20.
Therefore, the other day they had a meeting with representatives of the State Committee of the Republic of Uzbekistan on Land Resources, Geodesy, Cartography and State Cadastre.