| Waddliaceae use Chlamydiales |
| Waddliáceas use Chlamydiales |
| Waikavirus |
| WAIS-R use Escalas de Wechsler |
| Wakame use Undaria |
| Wallabies use Macropodidae |
| Waltheria use Sterculiaceae |
| Wangiella use Exophiala |
| Warneria canadensis use Hydrastis canadensis |
| Wasabia |
| Washington |
| Washington D.C. use District of Columbia |
| Water Moccasin use Colubridae |
| Watermelon Stomach use Ectasia Vascular Gástrica Antral |
| Wautersia use Cupriavidus |
| Wautersia eutropha use Cupriavidus necator |
| WDHA use Vipoma |
| WDHH use Vipoma |
| WDSV use Epsilonretrovirus |
| Web 2.0 use Mídias Sociais |
| Web Browser use Navegador |
| Web Semântica |
| Webcasts |
| Webcasts como Assunto |
| Webs Semânticas use Web Semântica |
| Wedelia |
| Weisella use Leuconostocaceae |
| Weissella |
| Weltanschauung use Cosmovisão |
| West Virginia |
| West-Western Blotting use Far-Western Blotting |
| Western Blot use Western Blotting |
| Western Blotting |
| Western Immunoblotting use Western Blotting |
| WGA-HRP use Conjugado Aglutinina do Germe de Trigo-Peroxidase do Rábano Silvestre |
| Whortleberry use Vaccinium myrtillus |
| Wiesbaden Aqua |
| Wigglesworthia |
| Wikstroemia |
| Wildbad Aqua |
| Wildugen Aqua |
| Wilkstroemia viridiflora use Daphne indica |
| Williopsis |
| Willy-Willy use Ciclone Tropical |
| Winteraceae |
| Winteráceas use Winteraceae |
| WISC-IV use Escalas de Wechsler |
| WISC-V use Escalas de Wechsler |
| Wisconsin |
| Wisteria |
| Witanolídeos use Vitanolídeos |
| Withania |
| Withanolídeos use Vitanolídeos |
| WMS-IV-NL use Escalas de Wechsler |
| Wolbachia |
| Wolfiporia |
| Wolfiporia cocos use Wolfiporia |
| Wolfiporia extensa use Wolfiporia |
| Wolinella |
| Wolinella succinogenes use Wolinella |
| Woodfordia |
| Workflow use Fluxo de Trabalho |
| Workshops use Educação |
| 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 |
