| CR | calculation rate; calculus removed; calorie-restricted; cardiac rehabilitation; cardiac resuscitatio... |
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| OAK | Kjer optic atrophy |
| ORANS | Oak Ridge Analytical System |
| ORNL | Oak Ridge National Laboratory |
| TOP | termination of pregnancy; topoisomerase |
| ORNL | Oak Ridge National Laboratory |
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| BBTV | Banana bunchy top virus |
| BCTV | Beet curly top virus |
| TOP | termination of pregnancy |
| poison oak | Poison oak is a form of contact dermatitis or inflammation of the skin resulting from chemicals produced from the poison oak plant contacting the skin. The chemicals cause an immune reaction producing redness, itching and blistering of the skin. (12 Dec 1998) |
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| oak | 1. <botany> Any tree or shrub of the genus Quercus. The oaks have alternate leaves, often variously lobed, and staminate flowers in catkins. The fruit is a smooth nut, called an acorn, which is more or less inclosed in a scaly involucre called the cup or cupule. There are now recognised about three hundred species, of which nearly fifty occur in the United States, the rest in Europe, Asia, and the other parts of North America, a very few barely reaching the northern parts of South America and Africa. Many of the oaks form forest trees of grand proportions and live many centuries. The wood is usually hard and tough, and provided with conspicuous medullary rays, forming the silver grain. 2. The strong wood or timber of the oak. Among the true oaks in America are: Barren oak, or Black-jack, Q. Nigra. Basket oak, Q. Michauxii. Black oak, Q. Tinctoria: called also yellow or quercitron oak. Bur oak (see under Bur), Q. Macrocarpa; called also over-cup or mossy-cup oak. Chestnut oak, Q. Prinus and Q. Densiflora. Chinquapin oak (see under Chinquapin), Q. Prinoides. Coast live oak, Q. Agrifolia, of California; also called enceno. Live oak (see under Live), Q. Virens, the best of all for shipbuilding; also, Q. Chrysolepis, of California. Pin oak. Same as Swamp oak. Post oak, Q. Obtusifolia. Red oak, Q. Rubra. Scarlet oak, Q. Coccinea. Scrub oak, Q. Ilicifolia, Q. Undulata, etc. Shingle oak, Q. Imbricaria. Spanish oak, Q. Falcata. Swamp Spanish oak, or Pin oak, Q. Palustris. Swamp white oak, Q. Bicolour. Water oak, Q. Aguatica. Water white oak, Q. Lyrata. Willow oak, Q. Phellos. Among the true oaks in Europe are: Bitter oak, or Turkey oak, Q. Cerris (see Cerris). Cork oak, Q. Suber. English white oak, Q. Robur. Evergreen oak, Holly oak, or Holm oak, Q. Ilex. Kermes oak, Q. Coccifera. Nutgall oak, Q. Infectoria. Among plants called oak, but not of the genus Quercus, are: African oak, a valuable timber tree (Oldfieldia Africana). Australian, or She, oak, any tree of the genus Casuarina (see Casuarina). Indian oak, the teak tree (see Teak). Jerusalem oak. See Jerusalem. New Zealand oak, a sapindaceous tree (Alectryon excelsum). Poison oak, the poison ivy. See Poison. Silky, or Silk-bark, oak, an Australian tree (Grevillea robusta). Green oak, oak wood coloured green by the growth of the mycelium of certain fungi. Oak apple, a large, smooth, round gall produced on the leaves of the American red oak by a gallfly (Cynips confluens). It is green and pulpy when young. <zoology> Oak beauty, a British geometrid moth (Biston prodromaria) whose larva feeds on the oak. Oak gall, a gall found on the oak. See Gall. <botany> Oak leather See Pruner, the insect. Oak spangle, a kind of gall produced on the oak by the insect Diplolepis lenticularis. Oak wart, a wartlike gall on the twigs of an oak. The Oaks, one of the three great annual English horse races (the Derby and St. Leger being the others). It was instituted in 1779 by the Earl of Derby, and so called from his estate. To sport one's oak, to be "not at home to visitors," signified by closing the outer (oaken) door of one's rooms. Origin: OE. Oke, ok, ak, AS. Ac; akin to D. Eik, G. Eiche, OHG. Eih, Icel. Eik, Sw. Ek, Dan. Eeg. Source: Websters Dictionary (01 Mar 1998) |
| oak apple | An excrescence on the oak, Quercus infectoria (family Fagaceae) and other species of Quercus, caused by the deposit of the ova of a fly, Cynips gallae tinctorae; an astringent and styptic, by virtue of the tannin it contains. Synonym: gall, galla, oak apple. (05 Mar 2000) |
| top | 1. To cover on the top; to tip; to cap; chiefly used in the past participle. "Like moving mountains topped with snow." (Waller) "A mount Of alabaster, topped with golden spires." (Milton) 2. To rise above; to excel; to outgo; to surpass. "Topping all others in boasting." (Shak) "Edmund the base shall top the legitimate." (Shak) 3. To rise to the top of; to go over the top of. "But wind about till thou hast topped the hill." (Denham) 4. To take off the or upper part of; to crop. "Top your rose trees a little with your knife." (Evelyn) 5. To perform eminently, or better than before. "From endeavoring universally to top their parts, they will go universally beyond them." (Jeffrey) 6. To raise one end of, as a yard, so that that end becomes higher than the other. To top off, to complete by putting on, or finishing, the top or uppermost part of; as, to top off a stack of hay; hence, to complete; to finish; to adorn. 1. A child's toy, commonly in the form of a conoid or pear, made to spin on its point, usually by drawing off a string wound round its surface or stem, the motion being sometimes continued by means of a whip. 2. A plug, or conical block of wood, with longitudital grooves on its surface, in which the strands of the rope slide in the process of twisting. Origin: CF. OD. Dop, top, OHG, MNG, & dial. G. Topf; perhaps akin to G. Topf a pot. 1. The highest part of anything; the upper end, edge, or extremity; the upper side or surface; summit; apex; vertex; cover; lid; as, the top of a spire; the top of a house; the top of a mountain; the top of the ground. "The star that bids the shepherd fold, Now the top of heaven doth hold." (Milton) 2. The utmost degree; the acme; the summit. "The top of my ambition is to contribute to that work." (Pope) 3. The highest rank; the most honorable position; the utmost attainable place; as, to be at the top of one's class, or at the top of the school. "And wears upon hisbaby brow the round And top of sovereignty." (Shak) 4. The chief person; the most prominent one. "Other . . . Aspired to be the top of zealots." (Milton) 5. The crown of the head, or the hair upon it; the head. "From top to toe" "All the stored vengeance of Heaven fall On her ungrateful top !" (Shak) 6. The head, or upper part, of a plant. "The buds . . . Are called heads, or tops, as cabbageheads." (I. Watts) 7. A platform surrounding the head of the lower mast and projecting on all sudes. It serves to spead the topmast rigging, thus strengheningthe mast, and also furnishes a convenient standing place for the men aloft. 8. A bundle or ball of slivers of comkbed wool, from which the noils, or dust, have been taken out. 9. Eve; verge; point. "He was upon the top of his marriage with Magdaleine." 10. The part of a cut gem between the girdle, or circumference, and the table, or flat upper surface. Top is often used adjectively or as the first part of compound words, usually self-explaining; as, top stone, or topstone; top-boots, or top boots; top soil, or top-soil. Top and but, a phrase used to denote a method of working long tapering planks by bringing the but of one plank to the top of the other to make up a constant breadth in two layers. <zoology> Top minnow, a small viviparous fresh water fish (Gambusia patruelis) abundant in the Southern United States. Also applied to other similar species. Origin: AS. Top; akin to OFries. Top a tuft, D. Top top, OHG. Zopf end, tip, tuft of hair, G. Zopf tuft of hair, pigtail, top of a tree, Icel. Toppr a tuft of hair, crest, top, Dan. Top, Sw. Topp pinnacle, top; of uncertain origin. Cf. Tuft. Source: Websters Dictionary (01 Mar 1998) |
| top-shaped | <botany> Having the shape of a top; cone-shaped, with the apex downward; turbinate. Source: Websters Dictionary (01 Mar 1998) |
| top-shell | <zoology> Any one of numerous species of marine top_shaped shells of the genus Thochus, or family Trochidae. Source: Websters Dictionary (01 Mar 1998) |
| turban-top | <botany> A kind of fungus with an irregularly wrinkled, somewhat globular pileus (Helvella, or Gyromitra, esculenta). Source: Websters Dictionary (01 Mar 1998) |
| flat top waves | Activity in the electroencephalogram having a pattern suggesting a flat top; these wave's are often found in temporal lobe discharges. (05 Mar 2000) |
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