"Monotropy" validity in different word game dictionaries

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

"monotropy" Definition

  1. the relation of two different forms of the same substance (as white and red phosphorus) that have no definite transition point since only one form (as red phosphorus) is stable and the change from the unstable form to the stable form is irreversible

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