WAnimal tooth development
WBlood–brain barrier
WBlood–testis barrier
WBone remodeling
WBradymetabolism
WCow dung
WCrenation
WEctotherm
WEndotherm
WEnteric fermentation
WEpoxide hydrolase 3
WEpoxydocosapentaenoic acid
WEurytherm
WFeces
WFossorial
WGigantothermy
WHeterothermy
WHomeothermy
WHepoxilin
W5-Hydroxyeicosatetraenoic acid
W12-Hydroxyeicosatetraenoic acid
WInduced ovulation (animals)
WInflammation
WKleptothermy
WLactation
WLimitations of animal running speed
WOssification
W5-Oxo-eicosatetraenoic acid
WPellets (petrology)
WPerspiration
WPhysiology of underwater diving
WPoikilotherm
WSpermatogenesis
WSurface wave detection by animals
WThermoregulation
WUrine
WVenom
WWarm-blooded