Definition of ablator in English:

ablator

noun

Astronautics Materials Science
  • Astronautics and Materials Sci. A protective surface layer (e.g. in a rocket engine) made of a material which ablates readily when heated and so reduces the transfer of external heat to the underlying material.

Origin

Mid 19th century (in an earlier sense). From ablate + -or.

Pronunciation:

ablator

/əˈbleɪtə/