retardant
Concise Oxford English Dictionary © 2008 Oxford University Press:
retardant/rɪˈtɑːd(ə)nt/
▶adjective [in combination] preventing or inhibiting: fire-retardant polymers. ▶noun a fabric or substance that prevents or inhibits the outbreak of fire.
– derivatives
retardancy noun.
retardancy noun.
'retardant' also found in these Oxford entries:

