catacaustic ( synonym found)
Definition of catacaustic:

(n) : a caustic curve formed by light reflecting from a curved surface; the envelope of all rays that emanate from a specified point (the radiant point) and reflect from a given curve; the evolute of the orthotomic
Definition of catacaustic:

(n) : a caustic curve formed by light reflecting from a curved surface; the envelope of all rays that emanate from a specified point (the radiant point) and reflect from a given curve; the evolute of the orthotomic
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