obesity
A medical condition in which an animal possesses an abnormally large amount of fat in the body
obligate aerobe
A type of organism that only has the ability to live in a free oxygen environment
obligate anaerobe
An organism that only has the ability to live in an environment free of free oxygen
obligate parasite
A type of parasite that must be confined to a certain type of host and can only survive as a parasite
obligate saprophytes
A type of micro organism that gets its nutrients from dead tissue and inorganic materials
obligate symbiotic
A type of organism that depends on another organism to exist
oblique projection
A beam that passes through the body at a certain angle
obstetrical chain
A type of chain used by a vet to help animals to deliver their young; used with cows and horses and helps to provide enough traction for the young.
obstetrics
The form of medicine that handles the birthing of young and the care of the mother during pregnancy
obstruction
The blockage of a passage or canal
obtunded
Depressed
occlusal surface
The surface of a tooth designed for chewing
occlusion
The type of contact that occurs between the teeth where chewing is concerned
occult
Something that is difficult to view; partially or fully hidden
occults spavin
A form of bone spavin that occurs at the hock in a horse
ocular
Anything having to do with the eye
odontomata
A type of tumor that forms in tissue before teeth are formed
off-side
The right side as pertaining to a horse
offal
The part of the carcass that is inedible; includes certain organs and tissue in an animal that has been slaughtered
offspring
The term for an animal’s young
oil gland
A type of gland found at the base of a chicken’s tail that secretes a type of oil used in preening
ointment
Salve; usually made of fat or petroleum and is often used for medicinal purposes
old-crop lambs
The term for a sheep over one year old that has lamb teeth
olfactory
Anything having to do with an animal’s sense of smell
oligodendrocyte
A type of cell with very few dendritic hairs or branches
oligospermia
A medical condition in which few sperm are found in semen
oligotrophia
A medical condition in which nutrients are lacking
oliguria
A medical condition in which there is not enough urination
omasum
The term for the third compartment in the stomach of ruminant animals
omnivore
A type of animal that lives off of both animal products and plant products
on feed
The term for an animal that is being fed grain or milk, usually for the production of meat
on pasture
The term for livestock that is being allowed to graze on pasture
oncology
The study of cancer and tumors
ontogeny
The process of development when it comes to living things; from egg to adult
onychectomy
The process of surgically removing the claw of an animal
onychomycosis
An infection of the claw by fungus
oocyst
The stage in the life of certain parasites in which they are encapsulated and usually passed through droppings
oogenesis
The processes in which germ cells are produced by female animals
oogonium
The first germ cell produced
oon egg
An egg that is expelled with no shell
oophorectomy
The removal of one or both ovaries by surgery
open heifer
The term for a female cow that is not yet pregnant
open herd
A mass of animals that allows for the entry of other animals
open herding
The process of allowing a band of animals to spread out and graze
open range
A large area in which animals are allowed to graze unrestricted
open-faced
The term for sheep with little to no wool over their eyes
ophthalmia
A medical condition in which the eye ball or lining becomes inflamed
ophthalmic
Anything having to do with the eye or care of the eye
ophthalmologist
A professional skilled in the study of the eye
ophthalmology
The study of the parts and health of the eye
ophthalmoscope
A type of tool used to look inside the eye
opportunistic
The ability to create a disease where a disease might not normally be found, usually due to an ill timed or unlikely weakness
optic chiasm
A condition in which the nerves in the brain having to do with vision become crossed
optic disk
A blind spot in the eye
optimum condition
The perfect environment for an organism to thrive in
orchidectomy
The removal of the testes through surgical means
orchitis
A condition in which the testes become inflamed
organic
Anything produced by animals or originating in animals; also has to do with chemical compounds that have carbon in them
organism
Any living thing made of cells
organogen
A type of chemical element in which organisms are not able to exist
organoleptic
Anything having to do with the senses, like taste, temperature, smell, etc.
orifice
Any body entrance or exit
orogastric intubation
The process of passing a stomach tube from the mouth to the stomach
oropharynx
The part of the throat that is found between the soft palate and the epiglottis
orthopedist
A person whose profession is charged with preserving or restoring parts of the skeletal system
os penis
The bone inside the penis of canine animals
osmophyllic
A type of organism that is known to grow in a solution high in osmotic pressure
osmosis
The transfer of water through a type of membrane
osmotic pressure
The amount of pressure required to cause osmosis to stop
ossification
The production of bone
ostealgia
Pain in the bones
ostectomy
Removal of the bone through surgical means
osteitis
A medical condition in which the bone becomes inflamed
osteoarthritis
A disease of the joints in which the cartilage and bone become degenerative
osteoblast
A cell that is used in the formation of bones
osteochondrosis
The degeneration of bone after regeneration
osteocyte
A bone cell
osteofibrosis
The loss of calcium salts in bones; this causes fragility. This condition is found in horses, pigs, goats, dogs, and certain types of animals
osteology
The study of the bones
osteomalacia
The softening of the bones; not normal in animals
osteomyelitis
A medical condition in which bone and bone marrow becomes inflamed
osteonecrosis
A medical condition in which bone tissue dies
osteophyte
A projection that can be found at the area where cartilage has begun to degenerate; sometimes they are free floating
osteoporosis
A medical condition in which bone porosity increases and bone density decreases
osteosarcoma
A neoplasm made up of bone, malignant in nature
osteotomy
An incision made into bone
otalgia
Pain of the ear
otic
Anything having to do with the ear
otitis
A medical condition in which the ear becomes inflamed
otitis externa
Inflammation of the external parts of the ear
otitis interna
Inflammation of the inner part of the ear
otitis media
Inflammation of the middle parts of the ear
otolith
A stone found in the utricle
otomycosis
An infection of the ear due to fungus
otopathy
A disease of the ear
otoplasty
A surgical repair made to the ear
otopyorrhea
A discharge of pus from the ear
otorrhea
Discharge from the ear
otoscope
A type of instrument used to look inside the ear
ototoxic
Something that is poisonous to the ear
outbred
Young from parents that are not related
outbreeding
Mating between animals who are not at all related
ova
The word for female eggs
oval window
The thin membrane between the middle ear and inner ear
ovarian cyst
The result of the accumulation of fluid in the female gonads
ovicide
Anything that is known to kill parasites while they are still eggs
oviducts
The term for the tubes that run from the uterus to the ovary; fallopian tubes
ovigenesis
The production of the female gamete
ovigonium
The germ cell that is used in creating the female gamete
ovine
The name for the species to which sheep belong
oviparous
Eggs that produce young
oviposition
The laying of an egg
ovotestis
The gonad, made up of the tissue of the ovaries and the testicles
ovulation
The process of the maturation and release of eggs
ovule
The mass that becomes the seed after fertilization
ovum
The female gamete
oxidase
Enzymes that are oxidizing
oxidation
A chemical change that has to do with adding oxygen or something like it
oxyhemoglobin
Any substance that is created when oxygen and hemoglobin are formed together
oxytocin
A type of hormone that is released during parturition that aids in the contraction of the uterus and causes milk to be released
ozena
A discharge of the nose that is caused by the inflammation of the mucous membranes; has to do with a disease of the nose bones
