[el-uh-muh nt] /ˈɛl ə mənt/
a component or constituent of a whole or one of the parts into which a whole may be resolved by analysis:
Bricks and mortar are elements of every masonry wall.
Chemistry. one of a class of substances that cannot be separated into simpler substances by chemical means. See also chart under periodic table.
a natural habitat, sphere of activity, environment, etc.:
to be in one’s element; Water is the element of fish.
any group of people singled out within a larger group by identifiable behavior patterns, common interests, ethnic similarities, etc.:
He worried that the protest rally would attract the radical element.
one of the substances, usually earth, water, air, and fire, formerly regarded as constituting the material universe.
Geometry. one of the points, lines, planes, or other geometrical forms, of which a figure is composed.
Astronomy. any of the data required to define the precise nature of an orbit and to determine the position of a planet in the orbit at any given time.
Electricity. an electric device with terminals for connection to other electrical devices.
Radio. one of the electrodes in a vacuum tube.
Astrology. any of the four triplicity groupings of signs: fire, earth, air, or water.
Optics. any of the lenses or other components constituting an optical system.
Grammar. any word, part of a word, or group of words that recurs in various contexts in a language with relatively constant meaning.
Digital Technology. the start and end tags in an electronic document or Web page, along with the text or other content between these tags.
See also 1 (def 9b).
any of the 118 known substances (of which 93 occur naturally) that consist of atoms with the same number of protons in their nuclei Compare compound1 (sense 1)
one of the fundamental or irreducible components making up a whole
a cause that contributes to a result; factor
any group that is part of a larger unit, such as a military formation
a small amount; hint: an element of sarcasm in her voice
a distinguishable section of a social group: he belonged to the stable element in the expedition
the most favourable environment for an animal or plant
the situation in which a person is happiest or most effective (esp in the phrases in or out of one’s element)
the resistance wire and its former, which constitute the electrical heater in a cooker, heater, etc
(electronics) another name for component (sense 2)
one of the four substances thought in ancient and medieval cosmology to constitute the universe (earth, air, water, or fire)
(pl) atmospheric conditions or forces, esp wind, rain, and cold: exposed to the elements
(pl) the first principles of a subject
(geometry) a point, line, plane, or part of a geometric figure
(maths, logic) one of the objects or numbers that together constitute a set
(Christianity) the bread or wine consecrated in the Eucharist
(astronomy) any of the numerical quantities, such as the major axis or eccentricity, used in describing the orbit of a planet, satellite, etc
one of the vertical or horizontal rods forming a television or VHF radio receiving aerial
(physics) a component of a compound lens
c.1300, “earth, air, fire, or water,” from Old French element (10c.), from Latin elementem “rudiment, first principle, matter in its most basic form” (translating Greek stoikheion), origin unknown. Meaning “simplest component of a complex substance” is late 14c. Modern sense in chemistry is from 1813. Elements “atmospheric force” is 1550s.
element el·e·ment (ěl’ə-mənt)
Our Living Language : When Russian chemist Dmitri Mendeleev devised the Periodic Table in 1869, there were 63 known elements. Mendeleev classified the known elements by atomic weight, and arranged a table listing them with vertical rows corresponding to shared chemical characteristics. Gaps in the table suggested the possibility of elements not yet discovered, and indeed elements were later discovered, or in some cases, artificially created, that filled the gaps and had the expected chemical properties. The striking correlation between the atomic weight of an element and its chemical properties was later explained by quantum mechanical theories of the atom. The weight of an atom of any given element depends on the number of protons (and neutrons) in its nucleus, but the number of protons also determines the number and arrangement of electrons that can orbit the nucleus, and it is these outer shells of electrons that largely determine the element’s chemical properties. Currently, 115 distinct elements are known.
In chemistry, any material (such as carbon, hydrogen, iron, or oxygen) that cannot be broken down into more fundamental substances. Each chemical element has a specific type of atom, and chemical compounds are created when atoms of different elements are bound together into molecules. There are 119 chemical elements whose discovery has been claimed; 92 occur in nature, and the rest have been produced in laboratories.
1. One of the items of data in an array.
2. One kind of node in an SGML, HTML, or XML document tree. An SGML element is typically represented by a start tag (”
“) and an end tag (”
“). In some SGML implementations, some tags are omissible, as with ”
” in HTML.
The start tag can contain attributes (”
“), which are an unordered set of key-value bindings for that element. Both the start tag and end tag for an element typically contain the “tag name” (also called the “GI” or generic identifier) for that element.
In XML, an element is always represented either by an explicit start tag and end tag, or by an empty element tag (“”).
Other kinds of SGML node are: a section of character data (“foo”), a comment (“”), a markup declaration (“”), or a processing instruction (“”).
noun, Chemistry, Physics. 1. . [ruhth-er-fawr-dee-uh m, -fohr-, ruhth-] /ˌrʌð ərˈfɔr di əm, -ˈfoʊr-, ˌrʌθ-/ noun, Chemistry, Physics. 1. a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Rf; atomic number: 104. [yoo-nil-kwod-ee-uh m] /ˌyu nɪlˈkwɒd i əm/ noun, Chemistry, Physics. 1. former name of . Symbol: Unq. /ˌrʌðəˈfɔːdɪəm/ noun 1. a transactinide […]
noun, Chemistry, Physics. 1. . [hah-nee-uh m] /ˈhɑ ni əm/ noun, Chemistry, Physics. 1. a proposed name for . Symbol: Ha. [yoo-nil-pen-tee-uh m] /ˌyu nɪlˈpɛn ti əm/ noun, Chemistry, Physics. 1. a former name of . Symbol: Unp. [doob-nee-uh m, duhb-] /ˈdub ni əm, ˈdʌb-/ noun, Chemistry, Physics. 1. a superheavy, synthetic, radioactive element with […]
noun, Chemistry, Physics. 1. . [see-bawr-gee-uh m, see-bawr-] /siˈbɔr gi əm, ˈsi bɔr-/ noun, Chemistry, Physics. 1. a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Sg; atomic number: 106. [yoo-nil-hek-see-uh m] /ˌyu nɪlˈhɛk si əm/ noun, Chemistry, Physics. 1. former name of . Symbol: Unh. /ˈsiːbɔːɡɪəm/ noun 1. a synthetic transuranic element, […]
noun, Chemistry, Physics. 1. . [yoo-nil-sep-tee-uh m] /ˌyu nɪlˈsɛp ti əm/ noun, Chemistry, Physics. 1. former name of . Symbol: Uns. [bawr-ee-uh m, bohr-] /ˈbɔr i əm, ˈboʊr-/ noun, Chemistry, Physics. 1. a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Bh; atomic number: 107. /ˈbɔːrɪəm/ noun 1. a transuranic element artificially produced […]