peristome

• Nom désignant la frange de dents ou d'appendices entourant l'ouverture de la capsule des mousses, ou la zone autour de la bouche chez divers invertébrés.

A noun referring to a fringe of toothlike appendages surrounding the mouth of a moss capsule, or the region around the mouth in various invertebrates.

1. Botanical structureC2formalscientific

   A fringe of tooth-like appendages that surrounds the opening of a moss capsule, aiding in spore dispersal.

   Péristome (mousse)

   • The peristome of the moss capsule opens when conditions are dry.
   • Botanists study the peristome to classify different moss species.
   • The teeth of the peristome move in response to humidity changes.

2. Zoological structureC2formalscientific

   The area or structures surrounding the mouth in various invertebrates, such as echinoderms or insects.

   Péristome (structure zoologique)

   • The sea urchin's peristome contains its feeding apparatus.
   • In some insects, the peristome is modified for specialized feeding.
   • The peristome of the starfish is located on its underside.