9 letters · 13 points in Scrabble
noun (botany) fringe of toothlike appendages surrounding the mouth of a moss capsule
noun region around the mouth in various invertebrates
originEtymology tree Proto-Indo-European *per-der. Ancient Greek περῐ́ (perĭ́)der. English peri- English -stome English peristome From peri- + -stome.
Etymology from Wiktionary, CC BY-SA 3.0