The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma (state of matter) interwoven with magnetic fields. It has a diameter of about 1,392,000 km, about 109 times that of Earth, and its mass (about 330,000 times that of Earth) accounts for about 99.86% of the total mass of the Solar System. Scientists calculate our Sun and solar system formed at the same time - a whopping 4.56 billion years ago.
Definition of crural. : of or relating to the thigh or leg; specifically : femoral crural artery.
Noun. 1. foramen-a natural opening or perforation through a bone or a membranous structure. hiatus. foramen of Monro, interventricular foramen, Monro's foramen-the small opening (on both the right and left sides) that connects the third ventricle in the diencephalon with the lateral ventricle in the cerebral hemisphere. foramen magnum-the large opening at the base of the cranium through which the spinal cord passes. opening, gap-an open or empty space in or between things; there was a small opening between the trees; the explosion made a gap in the wall. 1  Facebook. 2  Twitter.