URL universal resource locater

US unconditioned stimulus

UTP uridine 5'-triphosphate

UV ultraviolet

V vanadium or volt

VAChT vesicular acetylcholine transporter

Val valine

VAMP vesicle associated membrane protein (synaptobrevin)

VBR ventricular to brain ratio

VCAM vascular cell adhesion molecule

VGCC voltage gated Ca++ channel

VIP vasoactive intestinal peptide

VLCAD very long chain acyl-CoA dehydrogenase

VLCFA very long chain fatty acids

VMAT vesicular membrane amine transporters

VMH ventromedial hypothalamus

VNO vomeronasal organ

VPM ventral posterior medial nucleus

VT ventral tegmentum

w omega

W tungston (G. wolfram) or Watt

WHSC1 Wolf-Hirschhorn syndrome critical region

WIPTIDE Walsh inhibitor protein peptide

WM white matter

WRN gene defective in Werner's syndrome

WS Werner's syndrome

x zeta

Xe xenon

Xho I restriction endonuclease

y psi

Y Yttrium

YAC yeast artificial chromosome

YAP yeast aspartyl protease

Yb Ytterbium

Z valence

Zn zinc

Zr zirconium

ZS Zellweger syndrome