foramen magnumforamen magnum
the opening at the base of the skull where the spinal cord merges with the medulla oblongata
Origin of foramen magnumModL, large opening
The large orifice in the base of the skull through which the spinal cord passes to the cranial cavity and becomes continuous with the medulla oblongata.
Origin of foramen magnumNew Latin foramen magnum : Latin foramen, opening + Latin magnus, large.