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Eng ID | Term | Definition |
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2561 | inversion layer | Atmospheric LAYER, horizontal or approximately so, in which the temperature increases with increasing HEIGHT. See TEMPERATURE INVERSION. |
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2562 | inverted compass | See COMPASS: HANGING. |
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2563 | inverted image | See IMAGE. |
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2564 | inverting eyepiece | See EYEPIECE: ERECTING. |
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2565 | ionosphere | That part of the ATMOSPHERE, extending from about 70 to 500 km, in which ions and free electrons exist in sufficient quantities to reflect ... more |
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2566 | ionospheric disturbance | A sudden outburst of ultraviolet light on the sun, known as a Solar Flare, which produces abnormally high ionization in the region of the ... more |
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2567 | ionospheric storm | Violent changes in the state of the IONOSPHERE. |
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2568 | ionospheric wave | See WAVE: SKY. |
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2569 | ironbound | (adj.). Said of a rugged, rocky COAST which affords no ANCHORAGE. |
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2570 | irradiance (at a point of a surface) | Quotient of the FLUX of RADIATION incident on an infinitesimal element of surface containing the point under consideration, by the area of t... more |
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2571 | irradiation (at a point of a surface) | Product of an IRRADIANCE and its duration. |
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2572 | irregular error | See ERROR: ACCIDENTAL. |
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2573 | island | A piece of LAND completely surrounded by water. |
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2574 | island harbour | See under HARBOUR. |
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2575 | island shelf | See CONTINENTAL SHELF. |
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2576 | island slope | See CONTINENTAL SLOPE. |
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2577 | isle | An ISLAND. Now more usually applied to an ISLAND of smaller size, except in established appellation, as the 'British Isles'. |
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2578 | islet | A small ISLAND. |
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2579 | isobar | Line joining points of equal pressure on a given surface (level surface, vertical cross section, etc.). |
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2580 | isobath | See DEPTH CURVE, FATHOM LINE. |