1 Etymology and linguistic definitions
1.1 Languages where ████████ and blue are one color
2 In science
2.1 Color vision and colorimetry
2.2 Lasers
2.3 Pigments, food coloring and fireworks
2.4 Biology
2.5 ████████ eyes
3 In history and art
3.1 Prehistoric history
3.2 Ancient history
3.3 Postclassical history
3.4 Modern history
3.4.1 In the 18th and 19th century
3.4.2 In the 20th and 21st century
4 Symbolism and associations
4.1 Safety and permission
4.2 Nature, vivacity, and life
4.3 Springtime, freshness, and hope
4.4 Youth and inexperience
4.5 Calm, tolerance, and the agreeable
4.6 Jealousy and envy
4.7 Love and sexuality
4.8 Dragons, fairies, monsters, and devils
4.9 Poison and sickness
4.10 Social status, prosperity and the dollar
5 On flags
6 In politics
7 In religion
8 In gambling and sports
9 Idioms and expressions
10 Notes
11 See also
12 References
12.1 Cited texts
13 External links

1 Extent
2 Reasons
3 Other uses
3.1 Variations
3.2 Usage beyond hotels
4 Humor and opinions
5 See also
6 References
6.1 Notes
6.2 Further reading
7 External links

1 Types and associated terms
2 Consequences
3 Detection
4 Ethics
5 In other species
6 In culture
6.1 Cultural references
6.2 Fiction
7 Psychology
8 Religious perspectives
8.1 In the Bible
8.2 Augustine's taxonomy
8.3 In Buddhism
8.4 In Norse paganism
8.5 In Zoroastrianism
9 See also
10 References
11 Sources
12 Further reading
13 External links

1 History
1.1 Early Renaissance
1.2 18th and 19th centuries
1.3 Eve of World War I
1.4 World War I
1.5 Post-World War I
2 Types
2.1 Round
2.2 Cruciform
2.3 Annular and pull-down apex
2.4 Rogallo wing
2.5 Ribbon and Ring
2.6 Ram-air
2.6.1 Varieties
2.6.2 General characteristics
3 Deployment
4 Safety
5 Malfunctions
6 Records
7 See also
8 References
9 Sources
10 External links

1 Etymology
2 History and evolution
2.1 Origin
2.2 Mature writing system
2.3 Late Period
2.4 Late survival
3 Decipherment
4 Writing system
4.1 Phonetic reading
4.1.1 Uniliteral signs
4.1.2 Phonetic complements
4.2 Semantic reading
4.2.1 Logograms
4.2.2 Determinatives
4.3 Additional signs
4.3.1 Cartouche
4.3.2 Filling stroke
4.4 Signs joined together
4.4.1 Doubling
4.5 Grammatical signs
5 Spelling
6 Simple examples
7 Encoding and font support
8 See also
9 Notes and references
10 Further reading
11 External links

1 History of composition
2 Designs
3 Lincoln cent
3.1 History
3.1.1 Reverse design
3.1.1.1 Wheat cent (1909–1958)
3.1.1.2 Lincoln Memorial cent (1959–2008)
3.1.1.3 Lincoln Bicentennial cents (2009)
3.1.1.4 Union shield cent (2010–present)
3.1.2 "Capped cents"
3.1.3 Composition
3.2 Matte Proof Lincolns 1909 to 1916
3.3 Mint errors specific to Lincoln cents
4 Toxicity
5 Numismatics and regulations
6 Metal content and manufacturing costs
7 See also
8 References
9 External links

1 History
2 Chemical properties
3 Production
3.1 Laboratory preparation
4 Uses
4.1 Precursor to benzene and xylene
4.2 Nitration
4.3 Oxidation
4.4 Solvent
4.5 Fuel
4.6 Niche applications
5 Toxicology and metabolism
5.1 Recreational use
5.2 Bioremediation
6 References
7 External links

1 Polyhedra
1.1 Plane graphs
1.2 Proof of Euler's formula
2 Topological definition
3 Properties
3.1 Homotopy invariance
3.2 Inclusion–exclusion principle
3.3 Connected sum
3.4 Product property
3.5 Covering spaces
3.6 Fibration property
4 Examples
4.1 Surfaces
4.2 Soccer ball
4.3 Arbitrary dimensions
5 Relations to other invariants
6 Generalizations
7 See also
8 References
8.1 Notes
8.2 Bibliography
9 Further reading
10 External links

1 History
2 Terminals
2.1 Terminal 1
2.2 Terminal 3
2.3 Infield Concourse
2.4 VIP Terminal
3 Infrastructure and operations
3.1 Runways
3.2 Airfield operations
3.3 Cargo facilities
3.4 Security
3.5 Other facilities
4 Airlines and destinations
4.1 Passenger
4.2 Cargo
5 Ground transportation
5.1 Bus
5.1.1 Public transit
5.1.2 Private
5.2 Cars
5.2.1 Taxi
5.2.2 Rideshare
5.3 Train
5.3.1 Future
6 Statistics
6.1 Annual traffic
7 Incidents and accidents
8 See also
9 References
10 External links

1 Classifications
1.1 History
1.2 Taxonomy
1.3 Phylogeny
2 Evolution
2.1 Perissodactyl evolution
2.2 Artiodactyl evolution
2.2.1 Cetacean evolution
3 Characteristics
3.1 Anatomy
3.1.1 Hooves
3.1.2 Teeth
3.1.3 Cranial appendages
4 Inbreeding in small populations
5 See also
6 References
7 External links

1 Introduction
2 Claims and rebuttals
2.1 Vasin-Shcherbakov
2.2 The Moon rang like a bell
2.3 Density
3 Scientific perspective
4 In literature
5 References

1 Background
2 Geography of the line
3 History
4 Systematic errors and experiments to weigh the Earth
5 In culture
5.1 Name
5.2 Symbolism
5.3 In popular culture
5.3.1 Film
5.3.2 Cartoons
5.3.3 Literature
5.3.4 Music
5.3.5 Sports
6 See also
7 Notes
8 References
9 Further reading
10 External links

1 Delivery system
2 Varieties
3 Legionnaires' disease
4 See also
5 References
6 Further reading
7 External links

1 History
2 Non-models in the magazine
3 Reception
4 Locations
5 In other media
6 See also
7 References
8 Further reading
9 External links

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