sulfoquinovosyldiacylglycerol noun1 •A glycerophospholipid that, along with galactosyldiacylglycerol, is an important component of membranes of chloroplasts and related organelles and one of the most abundant lipids in photosynthetic tissues.Sulfoquinovosyldiacylglycerol lipids have also been identified in phototrophic and a few other bacterial species. — 2001 formssulfoquinovosyldiacylglycerols