coaming
noun/ˈkəʊ.mɪŋ/
Etymology From earlier coming, apparently from comb (“crest”) + -ing; however, exact origin uncertain.
2
A raised frame, designed to deflect or prevent entry of water, around an opening (e.g., a hatch or skylight) in a flat surface, such as a roof or deck.
- Creepers threaded the wrecked windows of the coaches, ancient and chalky brown with their riveted seams and welted coamings like something proofed for descents into the sea.1979, Cormac McCarthy, Suttree, Random House, page 92: