6 letters · 10 points in Scrabble
noun a dark grey cloud bearing rain
noun an indication of radiant light drawn around the head of a saint
originLearned borrowing from Latin nimbus (“dark cloud”). Doublet of nimb. Sense 2 (“grey rain cloud”) was coined by the British chemist and amateur meteorologist Luke Howard (1772–1864): see the 1803 quotation.
Etymology from Wiktionary, CC BY-SA 3.0