Definitions
1.NounAny of the thistles in the genus Silybum, especially Silybum marianum.
2.NounLactuca serriola, prickly lettuce
3.NounVarious plants of genus Sonchus (sow thistles) with milky sap:
Sonchus asper rough milk thistle
Sonchus arvensis field milk thistle
Sonchus oleraceus (common sow thistle)
Sonchus wilmsii
4.NounSonchus asper rough milk thistle
5.NounSonchus arvensis field milk thistle
6.NounSonchus oleraceus (common sow thistle)
7.NounSonchus wilmsii