From super- +‎ reflection.

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superreflection (countable and uncountable, plural superreflections)

1. The reflection of a reflected image, sound, magnetosonic wave, etc.
   • 1627 (indicated as 1626), Francis [Bacon], “III. Century.”, in Sylua Syluarum: Or A Naturall Historie. In Ten Centuries.[…], London: […] William Rawley[…]; [p]rinted by J[ohn] H[aviland] for William Lee[…], →OCLC:

     There be three kinds of reflections of sounds; a reflection concurrent, a reflection iterant, which we call echo; and a super-reflection, or an echo of an echo

• multireflection

• “superreflection”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.