触毛亚目：膜口亚纲(Hymenostomatia)膜纤目(Scuticociliatida)中的寄生性原虫，常有大量纤毛，两侧压缩，其特点为趋触区突出，位于前部，后端或其附近常有一胞质体，有几种前端有一明显吸盘，口周膜后节可能不明显- urodynamics
- urodynia
- uroedema
- uroenterone
- uroerythrin
- uroflavin
- uroflometer; uroflowmeter
- urofuscin
- urofuscohematin
- urogaster
- urogastrone
- urogenital
- urogenous
- uroglaucin
- urogram
- urography
- urogravimeter
- urohematin
- urohematonephrosis
- urohematoporphyrin
- urohypertensin
- urokinase
- urokinetic
- urokymography
- urolagnia