A - C
Addled: an egg where the contents are decomposing.
Air cell: the air space usually found at the large or blunt end of an egg.
Albumen: the white of an egg.
Amino acids: the simpler building units of protein.
Anticoccidial: a anticoccidial drug used to treat or prevent coccidiosis
Artificial insemenation: the introduction of semen into the female oviduct by methods other than by natural mating.
Aviary system: a system of housing based on the litter system where a number of mezzanine floors are installed to increase the available floor space and, in so doing, provide the space for more birds in the poultry house.
Beak trimming: The removal of part of the beak of poultry by specially designed equipment to prevent cannibalism and its associated vices.
Blastoderm: the fertilised nucleus of the egg from which the chicken develops.
Blastodisc: The unfertilised nucleus of an egg. No chicken can develop from a blastodisc.
Breed: a group of birds that reproduce their own likeness in their offspring. A variety is a group within a breed that are distinguished by a difference of a single characteristic eg. feather colour or comb type.
Broiler: a young bird of either sex bred and grown specifically for highly efficient meat production. Broilers are usually killed at 5 to 7 weeks of age (alternative term - meat chicken).
Brooder: the equipment used to provide supplementary warmth during the early stages of the chickens life. The energy used may come from electricity, gas, oil or from other sources.
Brooding: the period of the first weeks of a chickens life when it requires a very high standard of care including the provision of special diets and supplementary warmth.
Broody: the instinct controlled by maternal hormones that causes the female to want to set on eggs for hatching and to care for the chickens that hatch.
Caeca: the two blind gut of the digestive tract attached to the distal end of the small intestine.
Cages: a system of housing where the birds are confined to a wire floor singly or in multiples. With this system the stock do not come into contact with their own or other birds faeces - an important disease control measure.
Candle: to assess some internal characteristics of the egg by viewing it in a darkened room with a bright light behind the egg.
Cannibalism: the practice by some birds of attacking and eating other members of the same flock.
Chalazae: a type of albumen that surrounds the yolk of the egg and extends as creamy white, twisted, ropelike structures into each end to anchor the yolk in the centre of the egg.
Chick: the term used to describe chickens from day old to the end of brooding.
Chick-type drinker: a drinker that is more suitable for young chickens to access water.
Chick-type feeder: a feeder that is more suitable for young chickens to access food.
Clear eggs: infertile eggs (containing no embryos) usually removed from the incubator during incubation.
Cloaca: the common external opening for the digestive, urinary and reproductive tracts of the fowl.
Coccidiostat: a drug usually added to the food and used to prevent the disease coccidiosis.
Cock: a male that has finished one seasons as a breeder. Usually refers to older birds.
Cockerel: a young male from day old to the end of its first year of breeding. Often used to refer to young males up to 6 months of age.
Controlled environment housing: an intensive housing system where the operator can control temperature, air quality and light.
Crop: an organ, a part of the esophagus, located at the base of the neck and used as a storage place for food after eating but before digestion.
Crossbred: a bird with parents of two or more different genotypes (or breeds or varieties).
Crude protein: the nitrogen sources in food. It is not true protein as nitrogen is found in dietary compounds other than protein.
Cull: the identification and removal of non-productive birds from the flock.
Cuticle: the outer membrane or bloom on the eggs shell.
Chris