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.
Core - Thin glass center of the fiber where the light travels. Cladding - Outer optical material surrounding the core that reflects the light back into the core. Buffer coating - Plastic coating that protects the fiber from damage and moisture.