眼虫属：眼虫目(Euglenoidina)眼虫亚目(Euglenina)中的绿色植物样具鞭毛的原生动物，停滞的死水中常能大量发现，一般皆有具螺旋形或纵行条纹的表膜；表膜薄的眼虫，虫体极为柔软可塑；常见眼虫有绿眼虫(E. viridis)和小眼虫(E. gracilis)- peronia
- Per.op.emet.
- peropus
- peroral
- per os
- perosis
- perosomus
- perosplanchnia
- perosseous
- perotic
- peroxidase
- peroxide
- peroxisome
- peroxy-
- peroxyacetic acid
- peroxydol
- perphenazine
- perprimam
- perprimam intentionem
- perrectum
- Perrin-Ferraton disease
- Perroncito's apparatus(spirals)
- persalt
- persaltum
- Persantine