Meaning

noun a material that softens when heated and hardens again when cooled

adjective having the property of softening or fusing when heated and of hardening and becoming rigid again when cooled

originEtymology tree Proto-Indo-European *gʷʰer-der. Ancient Greek θερμός (thermós)der. English thermo- Proto-Hellenic *plátʰyō Proto-Hellenic *pláťťō? Ancient Greek πλάσσω (plássō) Proto-Indo-European *-tis Ancient Greek -τις (-tis) Ancient Greek -σῐς (-sĭs) Proto-Indo-European *-kos Ancient Greek -κός (-kós) ? Proto-Indo-European *-tós Proto-Hellenic *-tós Ancient Greek -τος (-tos) ▲ Ancient Greek…

Etymology from Wiktionary, CC BY-SA 3.0