nebule (2)youdaoicibaDictYouDict[nebule 词源字典]
"A moulding of a wavy or serpentine form", Early 19th century; earliest use found in Peter Nicholson (1765–1844), architectural writer and mathematician. Apparently from French nébulé nebuly; however, compare French nébules (plural) architectural moulding of a wavy form.[nebule etymology, nebule origin, 英语词源]