— superplasticity /sooh'peuhr plas tis"i tee/ , n.
/sooh'peuhr plas"tik/ , adj.
(of some metals and alloys) having the capacity to undergo extreme deformation at high temperatures.
[ 1945-50; SUPER- + PLASTIC; cf. Russ sverkhplastíchnost' (1945) superplasticity ]