(More fully "rhubarb Swiss chard") a variety of Swiss chard, Beta vulgaris var. cicla, with red leaf-stalks and midribs, grown for culinary use or ornament.
Origin
1940s; earliest use found in Burpee's Seed Catalogue for 1941.
Definition of rhubarb chard in US English:
rhubarb chard
noun
(More fully "rhubarb Swiss chard") a variety of Swiss chard, Beta vulgaris var. cicla, with red leaf-stalks and midribs, grown for culinary use or ornament.
Origin
1940s; earliest use found in Burpee's Seed Catalogue for 1941.