dog's cabbage
now rare
noun
1A fleshy plant, Theligonum cynocrambe (family Rubiaceae), grown as a pot-herb in Mediterranean regions.
2= dog's mercury.
Origin
Early 18th century; earliest use found in John Browne (1642–?1702/3), surgeon. After Hellenistic Greek κυνοκράμβη from ancient Greek κυνο- + κράμβη.