| invisible ink | n. A fluid that has no color in the visible spectrum, but may be detected under certain conditions, as under ultraviolet light. It may be used to write notes not readable under normal light. [ PJC ] |
| あぶり出し;炙り出し;焙り出し | [あぶりだし, aburidashi] (n, adj-no) invisible writing revealed by applying heat; writing done in invisible ink [Add to Longdo] |