Meaning

noun a small amount of residue

originBorrowed from Old Norse dregg (“sediment”), from Proto-Germanic *dragjō (whence also Icelandic dregg, Swedish drägg), from Proto-Indo-European *dʰrā́ks (“sediment”); see also Latin fraces (“lees of oil”), Albanian ndrag (“to make dirty, foul”), dra (“sediments of dairy products or liquids”).

Etymology from Wiktionary, CC BY-SA 3.0