| horary | 1. Of or pertaining to an hour; noting the hours. 2. Occurring once an hour; continuing an hour; hourly; ephemeral. "Horary, or soon decaying, fruits of summer." (Sir T. Browne) Horary circles. See Circles. Origin: LL. Horarius, fr. L. Hora hour: cf. F. Horaire. See Hour. Source: Websters Dictionary (01 Mar 1998) |
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| horde | A wandering troop or gang; especially, a clan or tribe of a nomadic people migrating from place to place for the sake of pasturage, plunder, etc.; a predatory multitude. Origin: F. Horde (cf. G. Horde), fr. Turk. Ord, ordi, camp; of Tartar origin. Source: Websters Dictionary (01 Mar 1998) |
| hordeic | <chemistry> Pertaining to, or derived from, barley; as, hordeic acid, an acid identical or isomeric with lauric acid. Origin: L. Hordeum barley. Source: Websters Dictionary (01 Mar 1998) |
| hordein | <chemistry> A peculiar starchy matter contained in barley. It is complex mixture. Origin: L. Hordeum barley. Source: Websters Dictionary (01 Mar 1998) |
| hordeivirus group | A group of plant viruses which primarily infect wheat, oats, and barley. They are rigid and rod-shaped, and are transmitted by seed and mechanically. (09 Oct 1997) |
| hordenine | A biogenic amine first isolated from barley; increases blood pressure. Synonym: anhaline. Origin: L. Hordeum, barley, + -in (05 Mar 2000) |
| hordeolum | A swelling in the eyelid that results from the plugging of a eyelid gland. A stye. (27 Sep 1997) |
| hordeolum externum | Inflammation of the sebaceous gland of an eyelash. Synonym: sty, stye. (05 Mar 2000) |
| hordeolum internum | An acute purulent infection of a meibomian (tarsal) gland. Synonym: acute chalazion, hordeolum meibomianum, meibomian sty. (05 Mar 2000) |
| hordeolum meibomianum | An acute purulent infection of a meibomian (tarsal) gland. Synonym: acute chalazion, hordeolum meibomianum, meibomian sty. (05 Mar 2000) |
| hordock | An unidentified plant mentioned by Shakespeare, perhaps equivalent to burdock. Source: Websters Dictionary (01 Mar 1998) |
| Horecker, Bernard | <person> U.S. Biochemist, *1914. See: Warburg-Dickens-Horecker shunt. (05 Mar 2000) |
| horehound | <botany> A plant of the genus Marrubium (M. Vulgare), which has a bitter taste, and is a weak tonic, used as a household remedy for colds, coughing, etc. Alternative forms: hoarhound] Fetid horehound, or Black horehound, a disagreeable plant resembling horehound (Ballota nigra). Water horehound, a species of the genus Lycopus, resembling mint, but not aromatic. Origin: OE. Horehune, AS. Harhune; har hoar, gray + hune horehound; cf. L. Cunila a species of organum, GR, Skr. Kny to smell. Source: Websters Dictionary (01 Mar 1998) |
| horizon | 1. The circle which bounds that part of the earth's surface visible to a spectator from a given point; the apparent junction of the earth and sky. "And when the morning sun shall raise his car Above the border of this horizon." (Shak) "All the horizon round Invested with bright rays." (Milton) 2. <astronomy> The unbroken line separating sky and water, as seen by an eye at a given elevation, no land being visible. 3. <geology> The epoch or time during which a deposit was made. "The strata all over the earth, which were formed at the same time, are said to belong to the same geological horizon." (Le Conte) 4. The chief horizontal line in a picture of any sort, which determines in the picture the height of the eye of the spectator; in an extended landscape, the representation of the natural horizon corresponds with this line. Apparent horizon. See Apparent. Artificial horizon, a level mirror, as the surface of mercury in a shallow vessel, or a plane reflector adjusted to the true level artificially; used chiefly with the sextant for observing the double altitude of a celestial body. Celestial horizon. <astronomy> See def. 2, above. Visible horizon. See definitions 1 and 2, above. Origin: F, fr. L. Horizon, fr. Gr. (sc) the bounding line, horizon, fr. To bound, fr. Boundary, limit. Source: Websters Dictionary (01 Mar 1998) |
| horizontal | 1. Pertaining to, or near, the horizon. "Horizontal misty air." 2. Parallel to the horizon; on a level; as, a horizontalline or surface. 3. Measured or contained in a plane of the horizon; as, horizontal distance. Horizontal drill, a drilling machine having a horizontal drill spindle. Horizontal engine, one the piston of which works horizontally. Horizontal fire, the fire of ordnance and small arms at point-blank range or at low angles of elevation. <physics> Horizontal force, the distance in a horizontal plane to which a gun will throw a projectile. Horizontal water wheel, a water wheel in which the axis is vertical, the buckets or floats revolving in a horizontal plane, as in most turbines. Origin: Cf. F. Horizontal. Source: Websters Dictionary (01 Mar 1998) |