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Animal Science General Terms
Terminology
94
Agriculture
Undergraduate 1
11/14/2011

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Term
Ad Libitum
Definition
allowing animals to eat all they want at all times
Term
A.I.
Definition
abbreviation for artificial insemination
Term
Anestrous period
Definition
that time when a female is not in estrus; the non-breeding season
Term
Breed
Definition
animals having a common origin and characteristics that distinguish them from other groups within the same species
Term
Calorie
Definition
the amount of heat required to raise the temperature of 1 gram of water from 15 degrees C to 16 degrees C
Term
Colostrum
Definition
the first milk given by a female following delivery of her young. Contains high levels of antibodies which are absorbed by the young for quick immunity
Term
Compensatory growth
Definition
increased growth rate in response to previous undernourishment
Term
Concentrate
Definition
a feed that is high in energy, low in fiber content, and highly digestible
Term
Cull
Definition
to eliminate from the breeding population
Term
Dry
Definition
refers to non-lactating females (mare, cow, ewe, sow)
Term
E.T.
Definition
abbreviation for embryo transfer
Term
Estrous
Definition
an adjective meaning "heat" that modifies such words as "cycle". Estrous cycle is the heat cycle, or time from one heat period to the next
Term
Estrus Synchronization
Definition
controlling the estrous cycle so that a high percentage of the females in the herd express estrus at the same time
Term
Estrus (Heat)
Definition
the period of mating activity in the female
Term
Fertility
Definition
the capacity to initiate, sustain, and support reprdouction
Term
Fill
Definition
the contents of the digestive tract
Term
Gestation Period
Definition
term of pregnancy; i.e. 340 days in mare
Term
Haploid
Definition
half the normal number of chromosomes. Found in sperm and ova
Term
Kilocalorie
Definition
1000 calories
Term
Lactation Period
Definition
period that female produces milk
Term
Libido
Definition
sex drive of the male
Term
Open
Definition
refers to non-pregnant females
Term
Roughage
Definition
a feed that is high in fiber, low in digestible nutrients, and low in energy. Such feeds as hay, straw, silage, and pasture are examples
Term
T.D.N.
Definition
total digestible nutrients; it includes the total amounts of digestible protein, nitrogen-free extract, fiber, and fat (multiplied by 2.25) all added together. Approximates energy content
Term
Weaning
Definition
taking a young animal from its dam (mother)
Term
Carcass Merit
Definition
the value of a carcass for consumption
Term
Contemporary Group
Definition
a set of animals of the same sex and breed that have been raised under similar environmental and management conditions
Term
Dark Cutter
Definition
color of the lean in the carcass; has a dark appearance usually caused by stress to the animal prior to slaughter
Term
DHIA
Definition
Dairy Herd Improvement Association. Dairy herds participate in keeping records
Term
Dystocia
Definition
difficult birth
Term
Feeder
Definition
animals that need further feeding prior to slaughter. Also a producer who feeds cattle
Term
Bovine
Definition
refers to cattle
Term
Equine
Definition
refers to horses
Term
Porcine
Definition
refers to swine
Term
Animal Unit
Definition
common denominator for measuring animal feed requirements where one animal unit is equivalent to the feed requirement for a 1000 lb. mature beef cow
Term
Animal unit month (AUM)
Definition
amount of feed or forage required to maintain one animal unit (e.g., a 1000 lb. cow and calf) for one month
Term
Antibiotic
Definition
product produced by living organisms such as yeast that destroys or inhibits the growth of other organisms, especially bacteria
Term
Artificial insemination (A.I.)
Definition
placing semen into the female reproductive tract (usually the cervix or uterus) by means other than natural service
Term
Auction
Definition
market for animals through which an auctioneer sells the animal to the highest bidder
Term
Average daily gain
Definition
pounds of liveweight gained per day
Term
Backfat
Definition
amount of fat over the animal's back, usually measured at the twelfth to thirteenth rib
Term
Biotechnology
Definition
use of microorganisms, plant cells, and animal cells or parts of cells (such as enzymes) to produce
Term
Birth weight (BW or B.Wt.)
Definition
weight of the animal taken within 24 hours of its birth
Term
Brand
Definition
(1)permanent identification of cattle or horses, usually made on the hide with hot-iron or freeze branding (2) process of branding
Term
Breakeven price
Definition
volume of output required for revenue to equal the total of fixed and variable expenses
Term
Breeder
Definition
in most breed associations, the owner of the dam at the time she was mated or bred to produce offspring
Term
Brucellosis
Definition
contagious bacterial disease that results in abortion; also called Bang's disease
Term
By-product
Definition
product of considerably less value than the major product
Term
Case ready
Definition
meat cuts received by the retailer that do not require further processing before they are put in the retail case for selling
Term
Cash market price
Definition
price that results when livestock go to market
Term
Composite breed
Definition
breed that has been formed by crossing 2 or more breeds
Term
Composition
Definition
usually refers to the carcass composition of fat, lean, and bone
Term
Cost of gain
Definition
total of all costs divided by the total pounds gained; usually expressed on a per pound basis
Term
Crossbreeding
Definition
mating animals from different breeds. Utilized to take advantage of hybrid vigor (heterosis) and breed complimentarity
Term
Cwt
Definition
abbreviation for hundredweight (100 lb.)
Term
Ear tag
Definition
method of identification by which a numbered, lettered, and/or colored tag is placed in the ear
Term
Embryo transfer
Definition
transfer of fertilized egg(s) from a donor female to one or more recipient females
Term
EPD (expected progeny difference)
Definition
one-half of the breeding value of a sire or dam
Term
Feedlot
Definition
enterprise in which cattle are fed grain and other concentrates for usually 90-120 days
Term
Forage
Definition
grazed or harvested herbaceous plants that are utilized by ruminants or horses
Term
Futures market
Definition
electronic market through which buyers and sellers trade contracts on commodities or raw materials
Term
Gene
Definition
segment of DNA in the chromosome that codes for a trait and determines how a trait will develop
Term
Grade and yield
Definition
marketing transaction whereby payment is made on the bases of carcass weight and quality grade
Term
Hedge
Definition
risk management strategy that allows a producer to lock in a price for a given commodity at a specified time
Term
Integrated resource management (IRM)
Definition
multidisciplinary approach to managing cattle more efficiently and profitably
Term
Integration
Definition
bringing together of two or more segments of beef productions and processing under one centrally organized unit
Term
Intermuscular fat
Definition
fat located between muscle systems. Also called seam fat
Term
Intramuscular fat
Definition
fat within the muscle or marbling
Term
Kosher meat
Definition
meat from ruminant animals (with split hooves) that have been slaughtered according to Jewish law
Term
Legume
Definition
any plant type within the family Leguminosae, such as pea, bean, alfalfa, and clover
Term
Linebreeding
Definition
form of inbreeding whereby a bull's genes are concentrated in a herd
Term
Marbling
Definition
flecks of intramuscular fat distributed in muscle tissue
Term
Meat
Definition
tissue of the animal body that are used for food
Term
Nutrient density
Definition
amount of essential nutrients relative to the number of calories in a given amount of food
Term
Packing plant
Definition
facility in which livestock are slaughtered and processed
Term
Pasture rotation
Definition
rotation of animals from one pasture to another so that some pasture areas have no livestock grazing on them during certain periods of time
Term
Price discovery
Definition
process that shows how the specific price for a given quantity and quality of beef is determined
Term
Purebred
Definition
animal eligible for registry with a recognized breed association
Term
Purveyor
Definition
firm that purchases beef (usually from a packer), then performs some fabrication before selling the beef to another firm
Term
Quality grades
Definition
grades such as Prime, Choice, and Select that group slaughter cattle and carcasses into value- and palatability-based categories. Grades are determined primarily by marbling and age of animal
Term
Ration
Definition
feed fed to an animal during a 24-hour period
Term
Red meat
Definition
meat from cattle, sheep, swine, and goats
Term
Registered
Definition
recorded in the herdblood of a breed
Term
Retail cuts
Definition
cuts of beef in sizes that are purchased by the consumer
Term
Rumen
Definition
a compartment of the ruminant stomach that is similar to a large fermentation pouch where bacteria and protozoa break down fibrous plant material swallowed by the animal
Term
Ruminant
Definition
mammal whose stomach has four parts- rumen, reticulum, omasum, and abomasums. Cattle, sheep, goats, deer, and elk are ruminants
Term
Silage
Definition
forage, corn fodder, or sorghum preserved by fermentation that produces acids similar to the acids used to make pickled foods for people
Term
Sire
Definition
male parent
Term
Synthetic breed
Definition
new breed created by crossing two or more breeds with estimated blood percentages
Term
Terminal sires
Definition
sires used in a crossbreeding system in which all their progeny, both male and female, are marketed
Term
Udder
Definition
encased group of mammary glands of the female
Term
Ultrasound
Definition
using high-frequency sound waves to show visual outlines of internal body structures (e.g., fat thickness, rib-eye area, and pregnancy can be predicted). The machine sends sound waves into the animal and records these waves as they bounce off the tissues
Term
Value-based marketing
Definition
marketing system based on paying for individual animal differences rather then using average prices
Term
Weaning (wean)
Definition
separating young animals from their dams so that the offspring can no longer suckle
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