| Iapetus |
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proper noun - (Greek mythology) A Titan, the son of Uranus and Gaia, and father of Atlas, Prometheus, Epimetheus, and Menoetius.
- (astronomy) The third largest moon of Saturn
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| immersion |
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noun
- the act of immersing or the condition of being immersed
- the total submerging of a person in water as an act of baptism
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| Indian |
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noun
- Person from India.
- Individual of, or related to, the aboriginal people of the Americas, before the arrival of Europeans. Also: Amerindian, Native American.
- (obsolete) An Australian Aborigine.
- (obsolete) A Maori.
- An Indian meal.
- We're going out tonight for an .
adjective
- Of or pertaining to India or its people.
- Of, or related to, the aboriginal people of the Americas, the people who lived in the Americas before the Europeans came, as well as the descendants of such people.
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| inferior |
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noun
- a person of lower stature to another
adjective
- of lower quality
- Anna had always felt to her brother due to poor school grades.
- of lower rank
- located below
- In botany, inside the flower stalk below the petals. Said of an ovary.
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| infrared astronomy |
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noun - (astronomy) the astronomical observation and study of objects, cooler than most stars, using the infrarde part of the electromagnetic spectrum
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| interferometer |
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noun - (physics) any of several instruments that use the interference of waves to determine wavelengths and wave velocities, determine refractive indices measure small distances, temperature changes, stresses, and many other useful measurements
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| intergalactic |
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adjective
- Occurring between galaxies.
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| interplanetary |
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adjective interplanentary
- between planets
- Humans are just beginning to explore travel.
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| interstellar |
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adjective - between the stars
- It can take centuries for light to travel distances.
- among the stars
- Space is littered with particles.
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| IO |
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initialism (or I/O)
- (computing), (electronics) input and output
- (grammar) Indirect Object
- German abbreviation for (lang, de, in Ordnung) ("all right")
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