| Waddliaceae use Chlamydiales |
| Waikavirus |
| WAIS-R use escalas de Wechsler |
| wakame use Undaria |
| Wakerobin use Trillium |
| Wallabies use Macropodidae |
| wallabies use Macropodidae |
| Waltheria use Sterculiaceae |
| Wangiella use Exophiala |
| warfarina |
| Warneria canadensis use Hydrastis canadensis |
| wasabi use Wasabia |
| Wasabia |
| Washington |
| Washingtón D.C. use distrito de Columbia |
| waterpolo use deportes acuáticos |
| Wautersia use Cupriavidus |
| Wautersia eutropha use Cupriavidus necator |
| web 2.0 use medios sociales |
| web semántica |
| webcasts use difusión en Internet |
| webcasts como asunto use transmisiones por internet como asunto |
| Webs Semánticas use web semántica |
| Wedelia |
| Weisella use Leuconostocaceae |
| Weissella |
| Weltanschauung use Cosmovisión |
| West Virginia |
| western blot use inmunotransferencia Western |
| western immunoblotting use inmunotransferencia Western |
| WGA-HRP use peroxidasa de rábano silvestre conjugada con aglutinina del gérmen de trigo |
| WGS use secuenciación del genoma completo |
| Whey use suero de leche |
| Whortleberry use Vaccinium myrtillus |
| Wiesbaden aqua |
| Wigglesworthia |
| Wikstroemia |
| Wildbad aqua |
| Wildugen aqua |
| Wilkstroemia viridiflora use Daphne indica |
| Williopsis |
| Willy-Willy use ciclón tropical |
| Winteraceae |
| Winteráceas use Winteraceae |
| WISC-IV use escalas de Wechsler |
| WISC-V use escalas de Wechsler |
| Wisconsin |
| Wisteria |
| witanólidos |
| Withania |
| withanólidos use witanólidos |
| WMS-IV-NL use escalas de Wechsler |
| Wolbachia |
| Wolfiporia |
| Wolfiporia cocos use Wolfiporia |
| Wolfiporia extensa use Wolfiporia |
| wolframio use tungsteno |
| Wolinella |
| Wolinella succinogenes use Wolinella |
| Woodfordia |
| world wide web use internet |
| WPPSI use escalas de Wechsler |
| Wrightia antidysenterica use kurchi |
| Wu wei zi use Schisandra |
| wu zhu yu use Evodia |
| Wuchereria |
| Wuchereria bancrofti |
| Wuweizi use Schisandra |
| www use internet |
| Wyethia helenoides |
| Wyoming |
