PERISTOMAL
- the one or two circles of small, pointed, toothlike appendages around the orifice of a capsule or urn of mosses, appearing when the lid is removed
- any of various structures or sets of parts that surround or form the walls of a mouth or mouthlike opening
- relating to the peristome, the area, or a structure, surrounding a mouth also PERISTOMATIC, PERISTOMIAL [adj]
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