Home › Words › T › tarweedtarweedtarweed means any of various American flowering plants that have sticky leaves.Among words judged in Lexicurio's Arena, tarweed ranks #27,109 of 42,762 for Qualifying.EtymologyFrom tar + weed.nounAny of various American flowering plants that have sticky leaves.e.g.“Some of the weeds that cause an undesirable flavor in milk are: onion, tarweed, scaleweed, garlic, mustard, pepper grass.” — 1944, Oregon. Agricultural experiment station, Circular of Information - Issues 323-395, page 3:Definitions & examples from Wiktionary (CC BY-SA 3.0).