breed

R

rachis

The end of the feather shaft

raddle

The colors that are used to mark a ram’s chest that rubs off on ewes once they have mated

radiation therapy

A treatment of certain neoplasms that is administered using an x ray

radiculitis

A medical condition in which the nerves of the spine are inflamed

radiograph

A record of body structures using an x-ray

radiography

A procedure of imaging internal body structures by exposing film

radiologist

A person who specializes in the imaging of internal body structures after exposing them to ionized radiation

radiology

The study of the internal structures of the body as pertaining to ionizing radiation

radiolucent

Refers to something that appears black or gray when observed on a radiograph

radiopaque

Something that appears white or light grey on a radiograph

ram jacket

A jacket that is designed to prevent a ram from mating while still allowing it to run with the flock

ram lamb

A sheep (male) less than one year old

random mating

A mating system in which males and females have an equal chance of mating with one another

random sample

A sample taken from an area without particular regard to from who, so every living thing in that group has the same chance of being part of that sample

rangy

The term for an animal who lacks real muscular structure, very lean and leggy in appearance

ranny

A calf that is of very poor quality

rasorial

The term used to refer to animals that scratch the ground

ration of maintenance

The amount of feed needed to sustain an animal

ratter

A female that is constantly in heat for some reason or another

rawhide

The skin of cattle that has not been dressed

rawhide quirt

A whip that is made of rawhide

reagent

Any type of substance that is involved in a chemical reaction

recessive

The term for a trait that is overshadowed by a gene that is more dominant in nature

reconstitute

To bring something back to its original form by adding water

rectal

Anything having to do with the rectum

rectal palpation

A way of determining pregnancy by inserting an arm into the rectum and feeling for the young

rectovaginal

Pertaining to the rectum and vagina

rectrices

Tail feathers used in flight

rectum

The very end of the large intestine

recumbent

The position of lying down

red cell count

The number of erythrocytes detected in every cubic millimeter of blood

regurgitate

Returning food that has been swallowed into the mouth; often results in vomiting

regurgitation

The return of food into the oral cavity after it has been swallowed

rein

To control a horse with the reins; this includes stopping, directing, and guiding them

reinsemination

The act of repeating the act of insemination

relaxin

A type of hormone that is produced at the time of birth; it is thought to provide assistance with relaxing of the birth canal during labor

remission

The disappearance of the signs and symptoms of a particular disease; this is often used in association with cancer

remount

A horse that is used to replace a horse that has been worn out or otherwise incapacitated

remuda

A collection of horses that have been broken

renal

Anything having to do with the kidneys

renal failure

The failure of the kidneys to perform their proper functions

renal infarction

A decrease in the amount of blood flowing to the kidneys

replacement animal

An animal that is raised to replace an older animal in a herd

reproduction

The act of bearing fruit or bringing forth young

respiratory rate

The number of respirations per minute; one respiration equals an inhalation and exhalation

responsive mouth

A horse that is trained to obey the reins

rest-rotation grazing

A system of grazing in which parts of the range are used for grazing while others parts of the range are rested

rested pasture

A pasture that remains ungrazed for the span of the whole growing season

restricted feeding

A feeding system in which food is only provided at certain points throughout the day

resuscitation

The restoration of life

retained placenta

A medical condition in which the mother animal fails to expel the placenta

retained teeth

The term for deciduous teeth that fail to fall out when they should

retaining pen

A pen that is designed for holding cattle and other animals when dipping, weighing, shearing, or anything else of that nature is taking place

reticulum

The cranial portion of the fore stomach in ruminant animals; is often called the honeycomb due to its texture

retina

The layer of the eye that is charged with receiving and processing images

ross test

A test of urine that is used to determine the presence of ketone and acetonemia in domestic animals

rostral

The end of the head containing the nose

rot

A type of decay that is caused by fungus or bacteria

rotated pasture

A pasture in a system of crop rotation that is grazed and then plowed to make room for other crops

rotation grazing

A system of grazing in which pastures are rotated to allow for appropriate recovery

rough coat

An animal’s coat that indicates lack of proper care by looking or being coarse or tangled

roughage

A type of animal feed that is high in fiber; may include hay or pasture crops

roundworms

An unsegmented parasitic worm belonging to the Nematoda class

rowel

In equine terms, the wheel of points found on a spur

rubber sleeve

A type of long, protective sleeve and glove that is used to cover the arms during insemination or other work that requires such protection

rubefaciant

Any type of substance that causes the skin to be red when it comes into contact with it

rudimentary

Not fully developed

rudimentary teat

A teat that is not fully developed and so may not be connected with the tissue responsible for the secretion of milk

rumenology

A branch of study involving the processes of the rumen

rumenotomy

The act of cutting into the rumen to make an observation or to remove something

ruminant

An animal with a fore stomach that chews its cud

ruminating

The act of chewing the cud

rumination

A series of functions pertaining to the digestive processes of ruminant animals

rump

The rear end of an animal

run free

To be loose and unrestricted

runt

An animal that is born smaller than its siblings and is not used for breeding; this may be due to genetics

rutting season

The season in which animals are in heat