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parvovirus

(Encyclopedia) parvovirusparvoviruspärˌvōvīˈrəs [key], any of several small DNA viruses that cause several diseases in animals, including humans. In humans, parvoviruses cause fifth disease, or…

Aristotle

(Encyclopedia) AristotleAristotleărˌĭstŏtˈəl [key], 384–322 b.c., Greek philosopher, b. Stagira. He is sometimes called the Stagirite. After the decline of Rome, Aristotle's work was lost in the…

dysentery

(Encyclopedia) dysenterydysenterydĭsˈəntĕrˌē [key], inflammation of the intestine characterized by the frequent passage of feces, usually with blood and mucus. The two most common causes of dysentery…

Alzheimer's disease

(Encyclopedia) Alzheimer's diseaseAlzheimer's diseaseălsˈhīˌmərz, ôls– [key], degenerative disease of nerve cells in the cerebral cortex that leads to atrophy of the brain and senile dementia and,…

parasite

(Encyclopedia) parasite, plant or animal that at some stage of its existence obtains its nourishment from another living organism called the host. Parasites may or may not harm the host, but they…

Nelson, Thomas

(Encyclopedia) Nelson, Thomas, 1738–89, American Revolutionary general, signer of the Declaration of Independence, b. Yorktown, Va. He was a delegate to the Continental Congress (1775–77, 1779),…

red bug

(Encyclopedia) red bug, name for various red insects or arachnids. Chief among them are the cotton stainer of the S United States, which pierces the seeds of the cotton plant and discolors the fibers…

derecho

(Encyclopedia) derechoderechodərāˈchō [key], a long-lived windstorm over a wide expanse that is associated with a line of rapidly moving thunderstorms or showers. The winds in a derecho generally…

fallout

(Encyclopedia) fallout, minute particles of radioactive material produced by nuclear explosions (see atomic bomb; hydrogen bomb; Chernobyl) or by discharge from nuclear-power or atomic installations…