sealights

Noun

sealight (countable and uncountable, plural sealights)

1. Light from the sea.
   • Those sealights have been explained by a diversity of causes ; but the singular brilliancy of the Red Sea seems owing to fish-spawn and animalculae, a conjecture which receives some corroboration from the circumstance that travellers who mention it visited the gulf during the spawning period, —...1834, Andrew Crichton, The History of Arabia, page 67
2. A light on the seacoast to warn or guide boats.
   • When we had crossed from Gaul, guided by the lofty sealight of Dubrae (Dover, if you will), our mariners cast anchor under the massive walls of the citadel of Rutupiae, chief port in our remote province of Britain, which is, in your tongue, Richborough, near Sanwich.1860, “Latin London”, in Charles Dickens, editor, All the Year Round: A Weekly Journal, volume 3, page 78