A hernia occurs when there is a weakness or tear in your abdominal wall as a result of aging, injury, a previous surgical incision, or a condition present at birth. Hernias generally grow larger due to pressure on them, such as a loop of your intestine or fatty tissue pushing into the weak abdominal tissue or tear. The result is a sac that forms in the abdominal wall. You may or may not see a bulge at this point. As more abdominal contents push into the sac, a bulge will appear.
1 Used other than as an idiom: see outer ,â core. ( 2 planetology) The hot liquid material found near the centre of some planets, distinct from the solid inner core. ( 3 geology) The part of the Earth between the mantle and inner core, responsible for generating the planet's magnetic field. 4  Link/Cite.
In other fields, such as: In Physics, a nucleus refers to the positively-charged center of an atom that usually contains the protons and neutrons. In Chemistry, a nucleus is a fundamental arrangement of atoms that occur in compounds through substitution of atoms without a change in structure.n Botany, a nucleus is the central kernel of a nut or seed, or the center of a starch granule. In Anatomy, a nucleus is a group of specialized nerve cells in the brain or spinal cord. Word origin: L: kernel, syncopated var. of nuculeus, equiv. to nucu(la) little nut (nuc-, s. of nux nut + -ula-ULE) + -leus n. suffix.