| REE | rapid extinction effect; rare earth element; resting energy expenditure |
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| LEO | Low Earth Orbit |
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| REE | Rare Earth Elements |
| earth flax | <chemical> A variety of asbestus. See Amianthus. Source: Websters Dictionary (01 Mar 1998) |
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| flax | 1. <botany> A plant of the genus Linum, especially. The L. Usitatissimum, which has a single, slender stalk, about a foot and a half high, with blue flowers. The fibre of the bark is used for making thread and cloth, called linen, cambric, lawn, lace, etc. Linseed oil is expressed from the seed. 2. The skin or fibrous part of the flax plant, when broken and cleaned by hatcheling or combing. Earth flax, amianthus. <botany> New Zealand flax See Flax-plant. Origin: AS. Fleax; akin to D. Vlas, OHG. Flahs, G. Flachs, and prob. To flechten to braid, plait,m twist, L. Plectere to weave, plicare to fold, Gr. To weave, plait. See Ply. Source: Websters Dictionary (01 Mar 1998) |
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| flax-dresser's disease | <disease> Chronic obstructive pulmonary disease caused by inhalation of particles of unprocessed flax; a form of byssinosis. See: byssinosis. (05 Mar 2000) |
| flax-plant | <botany> A plant in new Zealand (Phormium tenax), allied to the lilies and aloes. The leaves are two inches wide and several feet long, and furnish a fibre which is used for making ropes, mats, and coarse cloth. Source: Websters Dictionary (01 Mar 1998) |
| alkali earth metal | See: alkaline earth elements. (05 Mar 2000) |
| alkaline earth | <chemistry> Any of the metallic elements found in the second column of the periodic table, such as calcium and magnesium. (09 Oct 1997) |
| alkaline earth elements | Those element's in the family Be, Mg, Ca, Sr, Ba, and Ra, the hydroxides of which are highly ionised and hence alkaline in water solution. (05 Mar 2000) |
| rare earth elements | Those elements with atomic numbers 57-71 which closely resemble one another chemically and were once difficult to separate from one another. Synonym: rare earth elements. Origin: Lanthanum, first element of the series (05 Mar 2000) |
| rare earth metal | Those elements with atomic numbers 57-71 which closely resemble one another chemically and were once difficult to separate from one another. Synonym: rare earth elements. Origin: Lanthanum, first element of the series (05 Mar 2000) |
| rare-earth screen | An intensifying screen made of a rare-earth oxide phosphor, more efficient than calcium tungstate, especially at the higher kilovoltages used in modern radiography. (05 Mar 2000) |
| metals, alkaline earth | Metals that constitute the group IIa in the periodic table. (12 Dec 1998) |
| metals, rare earth | Elements of group IIIb of the periodic table from lanthanum, atomic number 57, to and including lutetium, atomic number 71. (12 Dec 1998) |
| diatomaceous earth | A type of silica-rich dirt which is soft, fine-grained, porous, light-coloured, and composed of the skeletons of diatoms (one-celled marine organisms with skeletons based on silicon). It is used as a filter. (09 Oct 1997) |
| earth | 1. <astronomy> Planet that is the third in order from the sun. It is one of the four inner or terrestrial planets of the solar system. 2. The softer inorganic matter composing part of the surface of the globe, in distinction from the firm rock; soil of all kinds, including gravel, clay, loam, and the like; sometimes, soil favorable to the growth of plants; the visible surface of the globe; the ground; as, loose earth; rich earth. "Give him a little earth for charity." (Shak) 3. <chemistry> Any earthy-looking metallic oxide, as alumina, glucina, zirconia, yttria, and thoria. A similar oxide, having a slight alkaline reaction, as lime, magnesia, strontia, baryta. 4. Earth is used either adjectively or in combination to form compound words; as, earth apple or earth-apple; earth metal or earth-metal; earth closet or earth-closet. Adamic earth, Bitter earth, Bog earth, Chian earth, etc. See Adamic, Bitter, etc. Alkaline earths. See Alkaline. Earth apple. Origin: AS. Eore; akin to OS. Ertha, OFries. Irthe, D. Aarde, OHG. Erda, G. Erde, Icel. Jor, Sw. & Dan. Jord, Goth. Airpa, OHG. Ero, Gr, adv, to earth, and perh. To E. Ear to plow. Source: Websters Dictionary (25 Jun 1999) |
| earth-eating | Geophagismgeophagy The practice of eating dirt or clay. Synonym: dirt-eating, earth-eating. Origin: Geo-+ G. Phago, to eat (05 Mar 2000) |
| earth-tongue | <botany> A fungus of the genus Geoglossum. Source: Websters Dictionary (01 Mar 1998) |
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