MAINTENANCE (diet)

A diet that supplies the nutrients required to maintain vital functions (heart beat, respiration) and assure a constant body temperature.


MAINTENANCE (state)

A physiological state in which the animal is neither gaining nor losing weight, performing work or expending nutrients for any type of production.


MAMMALS

A class of vertebrate animals distinguished by self-regulating body temperature, hair, and in the female (a) milk producing gland(s).


MASTICATION

To grind or crush (food) with or as if with the teeth to prepare it for swallowing and digestion (Syn: Chew).


MASTITIS

An infammation of the udder (often caused by a microbial infection) resulting in pain and the secretion of milk with a high count of white blood cells (referred to as somatic cell count).


MCAL

Abbreviation for Megacalorie.


MEAL

1. The episodes of feed ingestion throughout the day.
2. The edible seed or other edible part of a grain, coarsely ground (as opposed to flour which is finely ground).


MEGACALORIE

One million calories.


METABOLISM

Refers to all of the changes that nutrients undergo after they are absorbed from the digestive tract. Metabolism is divided into anabolism and catabolism.


METABOLITE

A product of metabolism of nutrients.


METABOLIZABLE PROTEIN

In ruminant nutrion, metabolizable protein, often abbreviated MP, is the amount of digestible protein that reach the small intestine, which is the source of amino acids absorbed into the blood. The three main sources of MP include rumen undegraded protein (the dietary protein fraction that has not been degraded in the rumen), the microbial (bacterial) protein synthesized in the rumen from the fermentation process, and the endogenous protein (intestinal digestive enzymes and sloughed cells from the gastro-intestinal tract). The latter source is minimal.


METRITIS

Inflammation of the uterus.


MICROBE

Animal or vegetal organism of microscopic dimension (syn Microorganism).


MICROORGANISM

(see Microbe).


MILK FEVER

Condition that occurs immediately or within the first day after calving. The cow has cold ears and a dry muzzle. This condition is due to a calcium imbalance. As opposed to what the name implies, there is no "fever", but rather a paralysis of the limbs.


MILL (a)

1. A building equipped with the machinery for grinding grain into flour or meal. 2. A device or mechanism such as rotating millstones, that grinds grain.


MILL (to)

To grind, pulverize or break down into smaller particle size in a mill.


MINERAL

1. The inorganic chemical elements (e.g., calcium phosphorus magnesium) determined by combusting a sample in a furnace and weighing the mineral residue. 2. Minerals play major roles in numerous metabolic processes. (syn Ash).


MONOGASTRIC

Having one digestive cavity (i.e., one stomach).


MORBIDITY

Morbidity is an incidence of ill health. It is measured in various ways, often by the probability that a randomly selected individual in a population at some date and location would become seriously ill in some period of time. Contrast to mortality.


Mortality

is incidence of death in a population. It is measured in various ways, often by the probability that a randomly selected individual in a population at some date and location would die in some period of time. Contrast to morbidity.


MULTIPAROUS (cow)

A cow that has given birth more than once.