四膜虫亚目：四膜虫亚纲(Hymenostomatia)四膜虫目(Hymenostomatida)中的纤毛原虫亚目，其特点为：都有纤毛，左有三个口微膜，右为波浪膜或口周膜，有粘液囊。大多在淡水中自由生活，少数为共生性，主要在非脊椎动物中。四膜虫属(Tetrahymena)为其代表- anesthesiophore
- anesthetic
- anesthetist
- anesthetization
- anesthetize
- anesthetometer
- anesthetospasm
- anestrum
- anestrus
- anethene
- anethole
- Anethum
- anetic
- anetiological
- anetoderma
- aneugamy
- aneuploid
- aneuploidy
- aneurine hydrochloride
- aneurogenic
- aneurysm
- aneurysmal
- aneurysmatic
- aneurysmectomy
- aneurysmoplasty