Articles: U
- Ukrainian Resorts
- Ulcer
- Ulen Gut Reaction
- Ulezko-Stroganova, Klavdiya Petrovna
- Ulnar Nerve
- Ultracentrifuge
- Ultrafiltration
- Ultramarine
- ULTRAMICROSCOPY
- Ultra-short Waves
- Ultrasound
- Ultraviolet Rays
- Umbilical Cord
- Umbilicus
- Umforder
- Unconditioned Reflex (An unconditioned reflex is an inborn species)
- Unconditioned Reflex (STIMULI participating in a number of Russian)
- Unconscious
- United States of America
- Unlawful Sexual Intercourse
- Unna Methods
- Unsaturated Compounds
- Upbringing
- Urachoplasty
- URAL RESORTS
- Uranism → see Sexual Perversions
- Urban Planning
- Urbanization
- Urea
- Urease
- UREMIA
- Ureter
- Ureterography
- URETHANES
- Urethra
- Urethritis
- URETHROGRAPHY
- Urethroscopy
- Uric Acid
- Uric Acid Infarct
- Uridrosis
- Urinary Bladder
- Urine
- Urobilin
- Urobilinuria
- Urodonal
- Urogenital Organs
- Urological Instruments
- Urology
- Urometer
- Urotherapy
- Urotropine
- Urticaria
- Uterine Artery
- Uterine Inversion
- Uterine Prolapse
- Uterine Rings
- Uterus
- Utilization
- Uveitis
- Uvula