| Horner's syndrome | <syndrome> A nerve condition which involves a dropping eyelid (ptosis), constricted pupil, enophthalmos and lack of sweating on one side of the face. Often seen in association with injury (for example neck fracture, penetrating injury) to the cervical sympathetic nerve trunk in the neck or a Pancoast tumour involving both the upper and lower brachial plexus. (29 Sep 1997) |
|---|---|
| Horner's teeth | Incisor teeth having a horizontal hypoplastic groove. (05 Mar 2000) |
| Horner, Johann | <person> Swiss ophthalmologist, 1831-1886. See: Horner's syndrome, Horner's pupil, Bernard-Horner syndrome, Horner-Trantas dots. (05 Mar 2000) |
| Horner, William | <person> U.S. Anatomist, 1793-1853. See: Horner's muscle, Horner's teeth. (05 Mar 2000) |
| Horner-Trantas dots | Evanescent white cellular infiltrates occurring in the bulbar form of vernal keratoconjunctivitis. (05 Mar 2000) |
| hornet | <zoology> A large, strong wasp. The European species (Vespa crabro) is of a dark brown and yellow colour. It is very pugnacious, and its sting is very severe. Its nest is constructed of a paperlike material, and the layers of comb are hung together by columns. The American white-faced hornet (V. Maculata) is larger and has similar habits. <zoology> Hornet fly, any dipterous insect of the genus Asilus, and allied genera, of which there are numerous species. They are large and fierce flies which capture bees and other insects, often larger than themselves, and suck their blood. Called also hawk fly, robber fly. To stir up a hornet's nest, to provoke the attack of a swarm of spiteful enemies or spirited critics. Origin: AS. Hyrnet; akin to OHG. Hornaz, hornuz, G. Horniss; perh. Akin to E. Horn, and named from the sound it makes as if blowing the horn; but more prob. Akin to D. Horzel, Lith. Szirszone, L. Crabo. Source: Websters Dictionary (01 Mar 1998) |
| hornet stings | Stings from hornets and other large stinging insects such as bees, yellow jackets and wasps can trigger allergic reactions varying greatly in severity. Avoidance and prompt treatment are essential. In selected cases, allergy injection therapy is highly effective. (the three a's of insect allergy are adrenaline, avoidance and allergist.) (12 Dec 1998) |
| hornfish | <zoology> The garfish or sea needle. Origin: AS. Hornfisc. Source: Websters Dictionary (01 Mar 1998) |
| hornification | Keratin formation or development of a horny layer; may also apply to premature formation of keratin. Synonym: cornification, hornification. (05 Mar 2000) |
| hornito | <geology> A low, oven-shaped mound, common in volcanic regions, and emitting smoke and vapors from its sides and summit. Origin: A dim. Fr. Sp. Horno oven, L. Furnus. See Furnace. Source: Websters Dictionary (01 Mar 1998) |
| hornotine | <zoology> A yearling; a bird of the year. Origin: L. Hornotinus of this year. Source: Websters Dictionary (01 Mar 1998) |
| hornowl | <zoology> See Horned Owl. Source: Websters Dictionary (01 Mar 1998) |
| hornpike | The garfish. Source: Websters Dictionary (01 Mar 1998) |
| hornpipe | An instrument of music formerly popular in Wales, consisting of a wooden pipe, with holes at intervals. It was so called because the bell at the open end was sometimes made of horn. A lively tune played on a hornpipe, for dancing; a tune adapted for such playing. "Many a hornpipe he tuned to his Phyllis." (Sir W. Raleigh) A dance performed, usually by one person, to such a tune, and popular among sailors. Source: Websters Dictionary (01 Mar 1998) |
| hornpout | <zoology> See Horned pout, under Horned. Source: Websters Dictionary (01 Mar 1998) |