"Diacaustic" validity in different word game dictionaries

Dictionary Validity
Scrabble US(US/Canada/Thailand - TWL/NWL) No
Scrabble UK(International - SOWPODS/CSW) Yes
Words with Friends(WWF) No

"diacaustic" Definition

  1. relating to a caustic curve or caustic surface formed by refraction— compare CATACAUSTIC
  2. a diacaustic curve or surface

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