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computer-aided design

(Encyclopedia)computer-aided design (CAD) or computer-aided design and drafting (CADD), form of automation that helps designers prepare drawings, specifications, parts lists, and other design-related elements using...

Foote, Horton

(Encyclopedia)Foote, Horton (Albert Horton Foote, Jr.), 1916–2009, American playwright and screenwriter, b. Wharton, Tex. He studied acting and acted in California and New York, and wrote his first one-act play i...

gametophyte

(Encyclopedia)gametophyte gəmēˈtəfītˌ [key], phase of plant life cycles in which the gametes, i.e., egg and sperm, are produced. The gametophyte is haploid, that is, each cell contains a single complete set o...

nirvana

(Encyclopedia)nirvana nērväˈnə [key], in Buddhism, Jainism, and Hinduism, a state of supreme liberation and bliss, contrasted to samsara or bondage in the repeating cycle of death and rebirth. The word in Sansk...

Rambouillet, Catherine de Vivonne, marquise de

(Encyclopedia)Rambouillet, Catherine de Vivonne, marquise de kätrēnˈ də vēvônˈ märkēzˈ də räNbo͞oyāˈ [key], 1588–1665, famous Frenchwoman, whose salon exercised a profound influence on French liter...

Psilotophyta

(Encyclopedia)Psilotophyta sīlōˌtŏfˈətə [key], division of vascular plants consisting of only two genera, Psilotum and Tmesipteris, with very few species. These plants are characterized by the lack of roots,...

ecology

(Encyclopedia)ecology, study of the relationships of organisms to their physical environment and to one another. The study of an individual organism or a single species is termed autecology; the study of groups of ...

drought

(Encyclopedia)drought, abnormally long period of insufficient rainfall. Drought cannot be defined in terms of inches of rainfall or number of days without rain, since it is determined by such variable factors as th...

endometriosis

(Encyclopedia)endometriosis ĕnˌdəmēˌtrē-ōˈsĭs [key], a condition in which small pieces of the endometrium (the lining of the uterus) migrate to other places in the pelvic area. The endometrial fragments ma...

Ghirlandaio, Domenico

(Encyclopedia)Ghirlandaio or Ghirlandajo, Domenico both: dōmĕˈnēkō gērländäˈyō [key], 1449–94, Florentine painter, whose family name was Bigordi. He may have studied painting and mosaics under Alesso Ba...