A regulated product that enables a child who is too small and/or immature safely to use the adult seat belt system in a moving vehicle. There are three main styles: rear-facing, forward-facing and boo [..]

A child restraint (CR), a child restraint system (CRS), or a child restraint device (CRD): A crash-tested seat, device or system that is specially designed to provide child crash protection. General terms for these systems include child safety seats, car seats, boosters or booster seats

– A common alternative term for child restraint system, especially when speaking with general audiences; easily confused in written material with “vehicle seat,” unless spelled as one word: "carseat."