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Cat Glossary – O

Glossary of Cat Terms:


Obesity: The condition of being obese; increased body weight caused by excessive accumulation of fat.

Ocicat: A new breed of cat characterized by a coat with spots that resemble a wild cat.

Odd-Eyed: Eyes of different color, such as one brown eye and one blue eye.

Oestrus: The periodic state of sexual excitement in the female of most mammals, excluding humans, that immediately precedes ovulation and during which the female is most receptive to mating; heat. Also known as estrus.

Olfactory: Of, relating to, or contributing to the sense of smell.

Olfactory Mucosa: The region of the nose that is responsible for the detection of smells.

Omnivore: A person or animal that feeds on both animal and vegetable substances

Onychectomy: The medical term for declawing, the surgical removal of a cat’s claws.

Ophthalmic: Of or relating to the eye; ocular.

Orchidectomy: See Neuter

Oriental Shorthair Cat: A breed of cat with a short, close-lying coat that is finely textured and glossy.

Otitis Media: Infection of the middle ear.

Otodectes Cyanotis: See Ear Mites

Outbreeding: The process of mating unrelated individuals in order to improve vigor or type.

Outcrossing: The mating of unrelated individuals of the same breed.

Ovaries: The usually paired female or hermaphroditic reproductive organ that produces ova and, in vertebrates, estrogen and progesterone.

Ovariohysterectomy: The surgical removal of one or both ovaries and the uterus. Also called oophorohysterectomy.

Ovulate: To produce ova; discharge eggs from the ovary.