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sudden infant death syndrome

(Encyclopedia)sudden infant death syndrome (SIDS) or crib death, sudden, unexpected, and unexplained death of an apparently healthy infant under one year of age (usually between two weeks and eight months old). SID...

squill

(Encyclopedia)squill, common name for two genera of Old World bulbous plants of the family Liliaceae (lily family). The horticulturists' squill is any plant of the genus Scilla, mostly spring-blooming low herbs wit...

calumet, peace pipe

(Encyclopedia)calumet [Fr.,=reed], name given by the French to the peace pipe used by the indigenous people of North America for smoking tobacco; it consisted of a long, feathered stem, with or without a pipe bowl....

Tonegawa, Susumu

(Encyclopedia)Tonegawa, Susumu, 1939–, Japanese molecular biologist, Ph.D. Univ. of California at San Diego, 1969. A member of the Basel Institute for Immunology in Switzerland (1971–81), he became a professor ...

gene

(Encyclopedia)gene, the structural unit of inheritance in living organisms. A gene is, in essence, a segment of DNA that has a particular purpose, i.e., that codes for (contains the chemical information necessary f...

protozoan

(Encyclopedia)protozoan prōˌtəzōˈən [key], informal term for the unicellular heterotrophs of the kingdom Protista. Protozoans comprise a large, diverse assortment of microscopic or near-microscopic organisms ...

fruit

(Encyclopedia)CE5 Types of fruit fruit, matured ovary of the pistil of a flower, containing the seed. After the egg nucleus, or ovum, has been fertilized (see fertilization) and the embryo plantlet begins to fo...

Haviland, John

(Encyclopedia)Haviland, John hăvˈĭlənd [key], 1792–1852, American architect, b. Philadelphia. Haviland was noted as a pioneer in prison architecture. His design for the Pennsylvania Eastern State Penitentiary...

antacid

(Encyclopedia)antacid, any one of several basic substances that counteract stomach acidity (see stomach). Antacids are used by physicians to treat hyperchlorhydria, i.e., the excessive production of hydrochloric ac...

cortex

(Encyclopedia)cortex, in botany, term generally applied to the outer soft tissues of the leaves, stems, and roots of plants. Cortical cells of the leaves and outer layers of nonwoody stems contain chloroplasts, and...