1. 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.
2. one of a class of substances that cannot be separated into simpler substances by chemical means.
3. a natural habitat, sphere of activity, environment, etc.: to be in one's element;Water is the element of fish.
4. elements,
• atmospheric agencies or forces; weather: a ruddy complexion from exposure to the elements.
• the rudimentary principles of an art, science, etc.: the elements of grammar.
• the bread and wine of the Eucharistic service.
5. 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.
6. one of the substances, usually earth, water, air, and fire, formerly regarded as constituting the material universe.
7. Mathematics.
• an infinitesimal part of a given quantity, similar in nature to it.
• an entity that satisfies all the conditions of belonging to a given set.
8. one of the points, lines, planes, or other geometrical forms, of which a figure is composed.
9. 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.
10. an electric device with terminals for connection to other electrical devices.
11. one of the electrodes in a vacuum tube.
12. any of the four triplicity groupings of signs: fire, earth, air, or water.
13. any of the lenses or other components constituting an optical system.
14. any word, part of a word, or group of words that recurs in various contexts in a language with relatively constant meaning.
15. the start and end tags in an electronic document or web page, along with the text or other content between these tags.

1. any of the 118 known substances (of which 93 occur naturally) that consist of atoms with the same number of protons in their nuclei
2. one of the fundamental or irreducible components making up a whole
3. a cause that contributes to a result; factor
4. any group that is part of a larger unit, such as a military formation
5. a small amount; hint
6. a distinguishable section of a social group
7. the most favourable environment for an animal or plant
8. the situation in which a person is happiest or most effective (esp in the phrases in or out of one's element)
9. the resistance wire and its former, which constitute the electrical heater in a cooker, heater, etc
10. electronics another name for component (def. 2)
11. one of the four substances thought in ancient and medieval cosmology to constitute the universe (earth, air, water, or fire)
12. atmospheric conditions or forces, esp wind, rain, and cold
13. the first principles of a subject
14. a point, line, plane, or part of a geometric figure
15. maths
• any of the terms in a determinant or matrix
• one of the infinitesimally small quantities summed by an integral, often represented by the expression following the integral sign
16. one of the objects or numbers that together constitute a set
17. the bread or wine consecrated in the Eucharist
18. any of the numerical quantities, such as the major axis or eccentricity, used in describing the orbit of a planet, satellite, etc
19. one of the vertical or horizontal rods forming a television or VHF radio receiving aerial
20. a component of a compound lens

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