Subject
- Uranium ores1
- Urinary organs--Calculi1
- Urine1
- Urns1
- Urology1
- Vanitas (Art)1
- Vaughan, William1
- Vegetius Renatus, Flavius1
- Vinegar1
- Volcanoes1
- Wilson, James, active 1702-17101
- Wollaston, William Hyde, 1766-18281
- Wolves1
- Woodpeckers1
- Worm, Ole, 1588-16541
- Worm, Villum1
- Worms1
- Zeolites1
- Zeuxis, active 5th century B.C.1
- Zinc ores1