Poultry Science Terms - M

Magnum: albumen secreting portion of the avian oviduct next to the infundibulum in which the thick white (albumen) is added

Malabsorption: excessive loss of nutrients through the feces

Malignant: tending to worsen, recur or spread; opposite of benign

Mandible: upper or lower portion of the beak or bill

Management: human factor in the production process which delimits pro­duction, accumulates information on their solution, analyses infor­mation, takes decisions, acts on them and bears responsibilities for action

Mandible: upper or lower bony portion of the beak

Marek’s disease: common, contagious viral disease common in chickens and can cause death. Commonly prevented by a vaccination administered immediately after chicks hatch.

Marination: soaking infusion of flavoring to improve taste

Mash: mixture of finely ground grains and other nutrients; finer than 'crumbles'. (see Layer Ration)

Mate: pairing of a rooster with one or more hens

Meat bird: bird bred and raised for its meat. Specific breeds, like our Conventional Broilers or Specialty Broilers, are selected for their rapid growth, plump meat, and texture; meat chicken

Meat Breeds: specific reeds of chickens developed for their quick growth and heavy muscles. These breeds are developed for eating

Meat chicken: see broiler

Meat spot: tiny white, gray, or brown speck in a freshly laid egg caused by a tiny piece of tissue that enters the egg during formation in the hen's oviduct

Mechanical transmission: disease causing agents carried on a surface (such as shoes, tires, shovels, etc.)

Meckel’s Diverticulum: protuberance on the wall of the lower part of the intestine that is present at hatch, place where yolk residue was absorbed into the body

Membrane: thin, soft, pliable sheet or layer of tissue covering an organ

Metabolic disease: disease involving a breakdown in the body's physical or chemical processes

Metabolism: physical and chemical processes that produce and maintain a living body; sum of the chemical changes in living cells which provide energy for the vital activities and processes of the body

Metabolizable energy (ME): The energy in a food ingredient or diet available for metabolism (used by the animal for normal body functions and activity)

Metastasis: transfer of a disease from one organ to another that it isn't directly touching

Metastasize: spread to other tissues or organs

Methionine: one of the essential amino acids

Microscopic: cannot be seen with the naked eye

Micro-ingredient: essential ingredient in the diet that is required by the bird in very small quantities

Milking: collection of semen in poultry by applying external massage to testes

Minerals: group of inorganic elements necessary for life, constituents of bones and teeth, along with being important for enzyme function, immunity and oxygen transport

Mite: tiny, joint-legged type of external (body) parasite

Mold: type of fungus

Molt (Moult): systematic part of the hen's reproductive cycle when she ceases egg production (stops laying) and loses her entire set of body feathers; initiated by hormonal influences but is often triggered by stress

Molting (Moulting): natural and normal physiological process of shedding of old feathers and growing new ones annually in poultry

Monogastric animal: animals with a single stomach

Morbidity: being affected by or is is showing clinical signs of disease or other health problem that typically requires the bird to be put down; percentage of a flock affected by a disease

Moribund: dying

Mortality: death due to disease or accident; percentage of a flock killed by a disease

Mossy: indistinct, irregular, or messy-looking markings that break up or destroy the intended color pattern on feathers

Mottled: plumage where a percentage of feathers are tipped with white; a discoloration of egg yolk caused by damage to the yolk membrane

Mounting: when the rooster mates with a hen

Mucus: slimy substance produced by mucus membranes.

Mucus membrane - The lining of body cavities

Muff: fluffy feathers sticking out from both sides of the face of chickens (tufts are feathers that protrude from the face) from such breeds as: Antwerp Belgian, Faverolle, and Houdan; also called "whiskers". Always found in conjunction with a beard

Mycosis: disease caused by a fungus.

Myopathy: disease of the muscles



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