The Open Dictionary

retardant

noun

UK/rɪˈtɑː.dᵊnt/
US/rɪˈtɑːr.dᵊnt/

Definitions of retardant noun

  1. CountableUncountable

    A substance that slows down or prevents a process or action.

    • This concrete uses a retardant to extend its workability time.

    • A flame retardant is added to this type of paint for safety reasons.

    • The wood was treated with a preservative and a mold retardant.

adjective

UK/rɪˈtɑː.dᵊnt/
US/rɪˈtɑːr.dᵊnt/

Definitions of retardant adjective

  1. CountableUncountable

    A substance that slows down or prevents a process or action.

    • This concrete uses a retardant to extend its workability time.

    • A flame retardant is added to this type of paint for safety reasons.

    • The wood was treated with a preservative and a mold retardant.