timing characteristic
121mathematics — /math euh mat iks/, n. 1. (used with a sing. v.) the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically. 2. (used with a sing. or pl. v.) mathematical procedures,… …
122sleep — sleepful, adj. sleeplike, adj. /sleep/, v., slept, sleeping, n. v.i. 1. to take the rest afforded by a suspension of voluntary bodily functions and the natural suspension, complete or partial, of consciousness; cease being awake. 2. Bot. to… …
123Uranus — /yoor euh neuhs, yoo ray /, n. 1. Astron. the planet seventh in order from the sun, having an equatorial diameter of 32,600 miles (56,460 km), a mean distance from the sun of 1,784 million miles (2,871 million km), a period of revolution of 84.07 …
124reproductive behaviour — In animals, any activity directed toward perpetuation of a species. Sexual reproduction, the most common mode, occurs when a female s egg is fertilized by a male s sperm. The resulting unique combination of genes produces genetic variety that… …
125ancient Rome — ▪ ancient state, Europe, Africa, and Asia Introduction the state centred on the city of Rome. This article discusses the period from the founding of the city and the regal period, which began in 753 BC, through the events leading to the… …
126biological development — Introduction the progressive changes in size, shape, and function during the life of an organism by which its genetic potentials (genotype) are translated into functioning mature systems (phenotype). Most modern philosophical outlooks would …
127human cardiovascular system — ▪ anatomy Introduction organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. It is a closed tubular system in which the… …
128inland water ecosystem — ▪ biology Introduction complex of living organisms in free water on continental landmasses. Inland waters represent parts of the biosphere within which marked biological diversity, complex biogeochemical pathways, and an array of… …
