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| Subject | English | Japanese |
| phys. | phase transition of the second kind | 第二零相転移 (だいにしゅ・そうてん'い) |
| phys. | second-order phase transition | 二次相転移 (にぢ・そうてん'い) |
| tech. | second-order transition point | ガラス転移点 (がらす・てん'い・てん) |
| tech. | second-order transition point | 二次転移点 (にじてんいてん) |
| gen. | n second play on the program | 二番目狂言 |
| gen. | n second play on the program | 二番目物 |
| gen. | second serving ball of noodles | 替玉 (to add to previously purchased ramen) |
| gen. | second serving ball of noodles | 替え玉 news1 nf12 (to add to previously purchased ramen, かえだま) |
| gen. | n second week's memorial services | 二七日 news1 nf11 |
| gen. | n second-year of junior high | 中２ |
| gen. | n second-year of junior high | 中二 |