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	Aphids aphid or plant louse, tiny, usually green, soft-bodied, pear-shaped insect injurious to vegetation. It is also called greenfly and blight. Aphids are mostly under 1/4 in. (6 mm) long. Some are wingless; others have two pairs of transparent or colored wings, the front pair longer than the... Read more
	Anthelmintics Antihelminthic Drugs Definition Antihelminthic drugs are used to treat parasitic infestations. Purpose Parasitic infestations are caused by protozoa or worms gaining entry into the body. Most of these organisms cause infections by being ingested in the form of eggs or larvae, usually present on... Read more
	Antisepsis Antisepsis Antisepsis is the destruction or inhibition of (slowing the growth of) microorganisms (very small living substances invisible without a microscope) that exist on living tissue. Antiseptics are the substances that kill or prevent the growth of the microorganisms. The name comes from the... Read more
	scientific notation scientific notation means of expressing very large or very small numbers in a compact form that is easy to use in computations. In this notation, any number is expressed as a number between 1 and 10 multiplied by a power of 10 that indicates the correct position of the decimal point in the original... Read more
	aphid aphid or plant louse, tiny, usually green, soft-bodied, pear-shaped insect injurious to vegetation. It is also called greenfly and blight. Aphids are mostly under 1/4 in. (6 mm) long. Some are wingless; others have two pairs of transparent or colored wings, the front pair longer than the... Read more
	Pseudomonas infections Pseudomonas Infections Definition A pseudomonas infection is caused by a bacterium, Pseudomonas aeruginosa, and may affect any part of the body. In most cases, however, pseudomonas infections strike only persons who are very ill, usually hospitalized. Description P. aeruginosa is a rod-shaped... Read more
	ladybird beetle ladybird beetle or ladybug, member of a cosmopolitan beetle family with over 4,000 species, including 350 species in the United States. Ladybird beetles are mostly under 1/4 in. (6 mm) long and are nearly hemispherical in shape, with very short legs. They are usually red or yellow with... Read more
	tulip tulip [Pers.,=turban], any plant of the large genus Tulipa, hardy, bulbous-rooted members of the family Liliaceae ( lily family), indigenous to north temperate regions of the Old World from the Mediterranean to Japan and growing most abundantly on the steppes of Central Asia. Cultivated tulips,... Read more
	giardiasis giardiasis , infection of the small intestine by a protozoan, Giardia lamblia. Giardia, which was named after Alfred M. Giard, a French biologist, is spread via the fecal-oral route, most commonly by eating food contaminated by the unwashed hands of an infected person or by drinking groundwater... Read more
	Multiplier MULTIPLIER The multiplier is a conceptual tool used to capture the complicated process by which changes in spending affect a nation's income. It is based on the idea that a small change in spending can bring about a much larger change in income. Consider the following example as an illustration of... Read more