| reactor core | 2.17 | Radioactive gases began seeping into the reactor core. | ||
| ice core | 1.12 | Thompson analyzed long, tube-shaped ice cores from glaciers in the Peruvian mountains. | ||
| apple core | 0.66 | It may be an apple core. | ||
| plutonium core | 0.46 | One plant would convert sealed plutonium cores, or pits, into a powder form. | ||
| city core | 0.39 | Hartford officials hope that the project will also help regenerate the city core. | ||
| foam core | 0.39 | Each box will be placed in another box, made of three-inch thick shock absorbent foam core. | ||
| iron core | 0.33 | He also has an iron core behind that permanent smile. | ||
| business core | 0.26 | He also claims that his business core is not in Italy. | ||
| honeycomb core | 0.26 | The skins are used to sandwich an aluminum honeycomb core. | ||
| sediment core | 0.26 | Hodgson counted seal hairs in sediment cores from Signy Island in the South Orkneys. |