A - Af

Ag - Al

Am - An

Ap - Ar

As - Aw

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B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

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Achondroplasia: Improper development of cartilage at the ends of the long bones, resulting in a form of congenital dwarfism. A defect in most breeds and a requisite in others like Dachshunds and Basset Hounds.

Acquired Immunity: Immunity obtained either from the development of antibodies in response to exposure to an antigen, as from vaccination or an attack of an infectious disease, or from the transmission of antibodies, as from mother to fetus through the placenta or the injection of antiserum. Results in resistance to further infection.

Acute Disease: An illness that manifests rapidly.

Affenpinscher: A breed of small dogs of European origin, having wiry, shaggy hair and a tufted muzzle.

Afghan Hound: A large, slender hunting dog having long, thick hair, a pointed muzzle, and drooping ears.

Afterbirth: The placenta and fetal membranes expelled from the uterus following the birth of each newborn puppy.

Agent: See Handler