n. 25B6; adjective
at high temperatures the rocks become plastic : MALLEABLE, mouldable, pliable, pliant, ductile, flexible, soft, workable, bendable; informal bendy.
the plastic minds of children : IMPRESSIONABLE, malleable, receptive, pliable, pliant, flexible; compliant, tractable, biddable, persuadable, susceptible, manipulable.
a plastic smile : ARTIFICIAL, false, fake, superficial, pseudo, bogus, unnatural, insincere; informal phoney, pretend.
rigid, intractable, genuine.