"Opeidoscope" 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

"opeidoscope" Definition

  1. an instrument consisting essentially of a tube across one end of which is stretched a thin flexible membrane bearing a small mirror and used for exhibiting upon a screen by rays reflected from the mirror vibratory motions caused by sounds

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