breed

L

labial surface

The term for the part of the tooth that touches the inside of the lips

labile

Something that is shaky or unstable

labium

A type of lip or fleshy divider or border

labyrinth

Another term for the inner ear

laceration

A cut into the skin that is made by accident

lachrymal gland

The gland that aids in the secretion of tears

lacrimation

A condition in which tears secrete normally

lacromotomy

A cut that is made into the lacrimal gland or the lacrimal duct

lactation

The formation and secretion of milk and the processes involved

lactiferous duct

The term for the tube that carries milk down into the nipples

lactiferous glands

The term for the glands that are found in the mammary tissue; they aid in the production of milk

lactogenic

Anything that is capable of stimulating the production of milk in females

lactogenic hormone

A type of hormone that is credited for stimulating the production of milk

lactometer

A type of tool that is used to calculate the density of milk

lambing

The act of giving birth to a young sheep

lambing loop

A length of wire that is used to assist in difficult lambing situations

lambing pen

A pen that is designed for ease and privacy of birth in ewes

lambing time

The part of the year when sheep are most likely to give birth to young

lamella

One of the several layers of a cell wall

lameness

Any type of pain or tenderness or lack of soundness in the feet or legs of animals

laminectomy

The removal of the lamina as a method of relieving pain and pressure on the spine

laminitis

An inflammation of the lamina in horses; causes pain or congestion of the lining

lane

Any road between fences that leads out to pastures or other open areas

lanolin

A fatty substance that is secreted by the glands in the skin of sheep

lapin

A term for a male rabbit that has been castrated

lariat

A rope or rawhide that is coiled on a saddle and used for restraining and branding livestock

larva

An insect that has hatched from an egg but has not yet reached the pupal stage

larvicide

Any type of substance that is used to kill parasites in their larval stage

laryngectomy

The act of removing the larynx through surgical methods

laryngitis

Inflammation of the larynx

laryngoplasty

The repair of the larynx through surgery

laryngoplegia

A medical condition in which the voice box becomes paralyzed

laryngoscope

A type of tool that is used to examine the larynx

laryngoscopy

An examination of the larynx done with an endoscope

larynx

The voice box; this is one part of the respiratory system

laser

A type of light device that transfers a bright beam; this is used for many medical purposes

lasso

The act of throwing a lariat so as to catch an animal by the neck or horns

latent

Term used to refer to an infection that is present but has not yet begun to spread

latent infection

The term for an infection that has been noticed but has yet to turn into an actual disease

lateral

Moving or located away from the midline; located along the side

lateral canthus

The corner of the eye on the outside; the corner that is found away from the nose

lateral incumbency

The act of lying on the side of the body

lateral ring bone

A growth on the side of the pastern on the leg of affected horses

lather

The collection of sweat on the hide of a horse

lavage

Irritating tissue with a great deal of some type of fluid

laxative

A type of medication that is used to loosen stool and relieve constipation

laxity

The degree to which something is loose or has not been tightened

layer

The term for a female that is kept solely for the purpose of producing eggs

lead cattle

The cattle at the head of the herd

lead line

A line at the top of an animal’s gum; its presence indicates lead poisoning

leg cues

Signals that are given using the rider’s legs that direct the movement of the horse

lensectomy

The removal of the lens through surgical means

lesion

A change in the way that tissue is constructed; a sore

lethargy

The condition of being drowsy, listless, or weak

leukemia

An increase in the number of bad white blood cells

leukocyte

White blood cells that are known for destroying disease and help to keep foreign substances out of the blood

leukocytosis

An increase in the number of white blood cells (abnormal)

leukopenia

A decrease in the number of white blood cells (abnormal)

libido

The measure of an animal’s sex drive or desire to mate

lice

Small, wingless insects that live as parasites on humans and some animals

life cycle

The series of changes that an organism goes through during its life

ligament

A band of connective tissue that hooks bones together or organs together

ligation

The actions involved in tying something

light feeder

The term used to refer to an animal that is being fed for maintenance and not for fattening

limbic

Another word for the border between something

limbic system

The part of the brain that deals with emotions and behavior

limited feeding

The manner of feeding livestock in which their basic needs for nutrition are addressed and attempts are not being made to fatten them or increase their level of productivity

linea alba

A band of tissue that connects the abdominal wall to the center of the abdomen; this is the white line that marks the midline of the abdominal muscles

lineal gland

The term for the gland that secretes the hormones that are responsible for the functions that come from the center of the brain

lingual surface

The face of the teeth that touches the tongue

liniment

Any type of solution that is used in the bathing and treatment of sprains and bruises; it contains a counter-irritant

linkage

The association of genetic traits from one generation to the next generation

lipase

An enzyme charged with digesting fat

lipemia

A medical condition in which there is a great deal of fat in the blood

lipemic serum

Fats in the blood that will have settled in the serum, causing it to appear cloudy

lipoid

Anything having to do with fat or fatty tissue

lipoma

A growth of fat cells, benign in nature

liquid manure

The liquid part of an animal’s excrement, usually urine

listless

Not with much energy; lethargic

litter

The group of offspring borne of the same laboring experience

litter floor

The floor in a poultry house; made up of straw, droppings, and other things and may build up over the period of one laying year

live foal guarantee

Usually a guarantee given by a breeding service, promising that the foal will be born live as a result of the service or there is no fee

live virus

Any virus that is still able to infect

live weight

The weight of an animal as compared to their weight after slaughter and dressing

liver

An organ found in living things that has a significant role in metabolic function and the production of bile

livestock

The term for domesticated farm animals that are raised for work, wool, milk, and other products and uses. May include pigs, cows, horses, and poultry.

livetin

A type of protein found in egg yolk that is able to dissolve in water

loading chute

A chute that is used to help load animals onto a trailer or truck

lobectomy

The removal of a lobe by surgical means

local anesthesia

The absence of feeling after anesthetic has been infected into an area nearby

local effect

Damage or effects that are caused at the point where the contact was originally made, like damage to the eye

lofty

The term for wool that is springy when pushed down as compared to other types of wool

loggering

A riding position in which the rider holds the saddle horn rather than sitting up in the saddle

loin

The region that includes the back, the thorax, and the pelvic area

long coupled

The term sued to indicate an animal with too much room between their hip point and last rib

long yearling

Any animal more than a year old

loose hay

Hay that is stored without having been baled or compressed

loose rein

A style of riding or driving in which the reins remain generally relaxed

loose side

The left side of a carcass of beef

lope

A slower type of gallop

lordosis

The curve in the spine, usually associated with an animal being in estrous

louse

A type of insect, parasitic in nature

lower respiratory tract

The part of the respiratory system that holds the bronchial tree and the lungs

lugger

A term for a horse that pulls at his bit

lumbar

The part of the back between the pelvis and the thorax

lumbosacral

The connection or relationship between the lumbar and the sacral vertebrae

lumen

Any opening in an organ

luminous

Something that gives off a light, usually a soft one

lumpectomy

A term used to refer to the removal of a mass from the body by surgical means

lung

The organ involved with respiration

lunker

The term for a horse that is awkward or heavy or larger than average; may refer to other animals as well at times

luster

Sheen and shine, as referred to an animal’s coat

luxation

The dislocation of a bone from the joint

lymph

A fluid that makes up the liquid part of blood; it lacks color

lymph nodes

Small structures that filter out the lymph and store lymphocytes

lymphadenectomy

The removal of the lymph nodes by surgical means

lymphadenitis

A medical condition in which the lymph nodes are inflamed

lymphadenopathy

Any disease of the lymph nodes

lymphangioma

The collection of lymphatic vessels, forming a benign lump; this is not normal

lymphatic

Anything pertaining to the blood vessel system in the body

lymphocyte

A type of leukocyte in the body

lymphocytosis

A heightened number of lymphocytic leukocytes in the blood of an animal

lymphoid

Any tissue belonging to the lymphatic system

lymphoma

A term for a type of neoplasm that is made up of lymphoid tissue; these masses are usually malignant in nature

lymphopenia

A decreased number of lymphocytic leukocytes in an animal’s blood system

lysin

Any antibody that can dissolve cells or cause them to disintegrate

lysis

The breakdown of something or the destruction of something, biologically speaking

lysozyme

Any type of enzyme that is known to destroy bacteria