aberrant - different than the accepted normal
albino - lacking normal pigmentation
amelanistic - albino, or lacking the pigment melanin
anerythristic - lacking red pigment
anterior - towards the front or head
aboreal - tending to live in trees
axanthic - lacking yellow pigment
caudal - toward the rear or tail
diurnal - active during the day
dorsal - the top or back
ecdysis - shedding of the skin
F1 - a first generation offspring
fuzzy - a young mouse (or rat) just getting its hair
gravid - pregnant
heterozygous - carrying the genes for a specific trait
hopper - a young mouse (or rat) just learning to hop
hypomelanistic - decreased black pigment
keel - a small ridge running down the center of a scale
leucistic - white color variation
melanin - black or brown pigment
oviparous - egg-laying
piebald - having white patches
pinky - newborn mouse or rat