| number |
the property possessed by a sum or total or indefinite quantity of units or individuals; "he had a number of chores to do"; "the number of parameters is small"; "the figure was about a thousand" a concept of quantity derived from zero and units; "every number has a unique position in the sequence" act: a short theatrical performance that is part of a longer program; "he did his act three times every evening"; "she had a catchy little routine"; "it was one of the best numbers he ever did" a numeral or string of numerals that is used for identification; "she refused to give them her Social Security number" phone number: the number is used in calling a particular telephone; "he has an unlisted number" numeral: a symbol used to represent a number; "he learned to write the numerals before he went to school" total: add up in number or quantity; "The bills amounted to $2,000"; "The bill came to $2,000" give numbers to; "You should number the pages of the thesis" issue: one of a series published periodically; "she found an old issue of the magazine in her dentist's waiting room" enumerate; "We must number the names of the great mathematicians" a select company of people; "I hope to become one of their number before I die" the grammatical category for the forms of nouns and pronouns and verbs that are used depending on the number of entities involved (singular or dual or plural); "in English the subject and the verb must agree in number" count: put into a group; "The academy counts several Nobel Prize winners among its members" an item of merchandise offered for sale; "she preferred the black nylon number"; "this sweater is an all-wool number" count: determine the number or amount of; "Can you count the books on your shelf?"; "Count your change" place a limit on the number of a clothing measurement; "a number 13 shoe"
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| nuclear fusion |
fusion: a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
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| nuclear fission |
fission: a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
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| nuclear physics |
the branch of physics that studies the internal structure of atomic nuclei
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| nuclear medicine |
the branch of medicine that uses radioactive materials either to image a patient's body or to destroy diseased cells
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