| Abbreviation | Definition |
|---|---|
| WKYR | Wistar-Kyoto Rat |
| WLDB | Wildebeest |
| WLK | Wilkins Livestock, Nebraska |
| WLRC | Winnebago Labrador Retriever Club |
| WMAH | Wolf Merrick Animal Hospital |
| WMAR | Western Michigan Appaloosa Regional |
| WMPE | World Minimum Population Estimate |
| WNC | Website Nature Center |
| WNRA | Waterfowl Natural Resources Area |
| WNS | White Nose Syndrome |
| WNVD | West Nile Virus Disease |
| WNVF | West Nile Virus Fever |
| WNVS | West Nile virus Society |
| WOAD | Welsh Office Agriculture Department |
| WOS | Washington Ornithological Society |
| WOS | Wilson Ornithological Society |
| WOVS | White Oak Veterinary Service |
| WPCS | Welsh Pony and Cob Society |
| WPH | Welborn Pet Hospital |
| WPHF | World Pet Hall Of Fame |