"Peristome" validity in different word game dictionaries

Dictionary Validity
Scrabble US(US/Canada/Thailand - TWL/NWL) Yes
Scrabble UK(International - SOWPODS/CSW) Yes
Words with Friends(WWF) Yes

"peristome" Definition

  1. the fringe of teeth surrounding the orifice of a moss capsule
  2. the region around the mouth in various invertebrates

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