The phrase "chemical cousins" refers to substances that have a similar structure or characteristics. Just like cousins in a family share some traits, these chemicals are related in terms of their properties or components. Full definition
Often, the substitutes are chemical cousins of the bad actors, likely to have similar hazards — but not yet enough science to «prove» the hazard. (treehugger.com)
Now, a new study at Washington University School of Medicine in St. Louis suggests that bacteriophages made of RNA — a close chemical cousin of DNA — likely play a much larger role in shaping the bacterial makeup of worldwide habitats than previously recognized. (sciencedaily.com)
Now a harmless chemical cousin of antifreeze, polyethylene glycol, has stepped up to the plate. (sciencemag.org)