noun
( plural parsley pierts )
Etymology: probably by folk etymology (influence of parsley (I) and of English dialect piert, alteration of English pert ) from Middle French perce-pierre, from percer to pierce + pierre stone, from Latin petra rock, stone, from Greek — more at pierce
1. : a small European annual herb ( Alchemilla arvensis or Aphanes arvensis ) of the family Rosaceae having fan-shaped 3-parted leaves with the divisions 2-cleft to 4-cleft and axillary greenish flowers
2. : a heath ( Erica aphanes ) of southern Africa
3. : knawel