flash·ing
noun/ˈflæʃɪŋ/
/ˈflæʃɪŋ/
[uncountable] (also flashings [plural])
- a narrow piece of metal put on a roof where it joins a wall to prevent water getting through
（房顶与墙交接处的）防雨板，盖片 Word Originlate 18th cent.: from the earlier synonym flash (of unknown origin) + -ing.