Definition of 重力井戸 (じゅうりょくいど)
じゅうりょくいど
                        重力井戸
じゅうりょくいど
juuryokuido
noun
•
        
gravity well (e.g. of a planet)(astronomy term)
Related Kanji
| 重 | heavy, important, esteem, respect, heap up, pile up, nest of boxes, -fold | 
| 力 | power, strength, strong, strain, bear up, exert | 
| 井 | well, well crib, town, community | 
| 戸 | door, counter for houses, door radical (no. 63) |