| hop | 1. A leap on one leg, as of a boy; a leap, as of a toad; a jump; a spring. 2. A dance; especially, an informal dance of ball. Hop, skip (or step), and jump, a game or athletic sport in which the participants cover as much ground as possible by a hop, stride, and jump in succession. 1. <botany> A climbing plant (Humulus Lupulus), having a long, twining, annual stalk. It is cultivated for its fruit (hops). 2. The catkin or strobilaceous fruit of the hop, much used in brewing to give a bitter taste. 3. The fruit of the dog-rose. See Hip. Hop back. See 1st Back. <botany> Hop clover, the climbing vine or stalk of the hop. Origin: OE. Hoppe; akin to D. Hop, hoppe, OHG. Hopfo, G. Hopfen; cf. LL. Hupa, W. Hopez, Armor. Houpez, and Icel. Humall, SW. & Dan. Humle. Source: Websters Dictionary (01 Mar 1998) |
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| hopanoid | <cell biology> Hopanoid is a chemical component in the cytoplasmic membranes of many bacteria. Hopanoid is a pentacyclic saturated derivative of mevalonic acid (mevalonic acid is a key intermediate in cholesterol biosynthesis) and is assumed to be functioning in a similar way to sterols, which serve to stabilise the structure of eukaryotic membranes. While sterols can make up 5-25 percent of the total lipids of eukaryotic membranes, they are absent from most of the prokaryotic membranes. (12 Sep 2002) |
| hope | 1. To desire with expectation or with belief in the possibility or prospect of obtaining; to look forward to as a thing desirable, with the expectation of obtaining it; to cherish hopes of. "We hope no other from your majesty." (Shak) "[Charity] hopeth all things." (1 Cor. Xiii. 7) 2. To expect; to fear. "I hope he will be dead." Hope is often used colloquially regarding uncertainties, with no reference to the future. "I hope she takes me to be flesh and blood." Source: Websters Dictionary (01 Mar 1998) |
| hopeite | <chemical> A hydrous phosphate of zinc in transparent prismatic crystals. Origin: Named after Professor Hope, of Edinburgh. Source: Websters Dictionary (01 Mar 1998) |
| hopeless | 1. Destitute of hope; having no expectation of good; despairing. "I am a woman, friendless, hopeless." (Shak) 2. Giving no ground of hope; promising nothing desirable; desperate; as, a hopeless cause. "The hopelessword of "never to return" Breathe I against thee, upon pain of life." (Shak) 3. Unhoped for; despaired of. Hope"lessly, Hope"lessness. Source: Websters Dictionary (01 Mar 1998) |
| Hopkins, Frederick | <person> An English biochemist and Nobel laureate. Lived: 1861-1947. See: Benedict-Hopkins-Cole reagent. (05 Mar 2000) |
| Hoplopsyllus anomalus | <entomology> A species of flea parasitic on ground squirrels of the western U.S., and a vector of plague. Origin: G. Hoplo, tool, weapon, + psyll, flea (05 Mar 2000) |
| Hopmann's papilloma | <otolaryngology> A papillomatous overgrowth of the nasal mucous membrane. Synonym: Hopmann's polyp. (05 Mar 2000) |
| Hopmann's polyp | <otolaryngology> A papillomatous overgrowth of the nasal mucous membrane. Synonym: Hopmann's polyp. (05 Mar 2000) |
| Hopmann, Carl | <person> A German rhinologist. Lived: 1849-1925. See: Hopmann's papilloma, Hopmann's polyp. (05 Mar 2000) |
| hopper | 1. One who, or that which, hops. 2. A chute, box, or receptacle, usually funnel-shaped with an opening at the lower part, for delivering or feeding any material, as to a machine; as, the wooden box with its trough through which grain passes into a mill by joining or shaking, or a funnel through which fuel passes into a furnace, or coal, etc, into a car. 3. See Grasshopper. 4. A game. See Hopscotch. 5. <zoology> See Grasshopper, and Frog hopper, Grape hopper, Leaf hopper, Tree hopper, under Frog, Grape, Leaf, and Tree. The larva of a cheese fly. 6. A vessel for carrying waste, garbage, etc, out to sea, so constructed as to discharge its load by a mechanical contrivance; called also dumping scow. <chemistry> Bell and hopper, the apparatus at the top of a blast furnace, through which the charge is introduced, while the gases are retained. Hopper boy, a rake in a mill, moving in a circle to spread meal for drying, and to draw it over an opening in the floor, through which it falls. Hopper closet, a water-closet, without a movable pan, in which the receptacle is a funnel standing on a draintrap. Hopper cock, a faucet or valve for flushing the hopper of a water-closet. See: 1st Hop. Source: Websters Dictionary (01 Mar 1998) |
| hopping | The act of one who, or that which, hops; a jumping, frisking, or dancing. <ornithology> Hopping Dick, a thrush of Jamaica (Merula leucogenys), resembling the English blackbird in its familiar manners, agreeable song, and dark plumage. Source: Websters Dictionary (01 Mar 1998) |
| hops | The dried fruits (strobiles) of Humulus lupulus (family Moraceae), a climbing herb of central and northern Asia, Europe, and North America; an aromatic bitter, mildly sedative, and a diuretic; primarily used in the brewing industry for giving aroma and flavor to beer. Synonym: hops. Origin: Mediev. L. (05 Mar 2000) |