| hollow wall | A condition of the hoof wall in the toe region of horses, characterised by loss of substance and change in character of the horn, most often as a sequela of mild chronic laminitis. Synonym: dystrophia ungulae, hollow wall. (05 Mar 2000) |
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| hollow-hearted | Insincere; deceitful; not sound and true; having a cavity or decayed spot within. Synonym: Faithless, dishonest, false, treacherous. Source: Websters Dictionary (01 Mar 1998) |
| hollow-horned | <zoology> Having permanent horns with a bony core, as cattle. Source: Websters Dictionary (01 Mar 1998) |
| holly | 1. <botany> A tree or shrub of the genus Ilex. The European species (Ilex Aguifolium) is best known, having glossy green leaves, with a spiny, waved edge, and bearing berries that turn red or yellow about Michaelmas. The holly is much used to adorn churches and houses, at Christmas time, and hence is associated with scenes of good will and rejoicing. It is an evergreen tree, and has a finegrained, heavy, white wood. Its bark is used as a febrifuge, and the berries are violently purgative and emetic. The American holly is the Ilex opaca, and is found along the coast of the United States, from Maine southward. 2. <botany> The holm oak. See 1st Holm. <botany> Holly-leaved oak, a species of Eryngium. See Eryngium. Origin: OE holi, holin, AS. Holen, holegn; akin to D. & G. Hulst, OHG. Huls hulis, W. Celyn, Armor. Kelen, Gael. Cuilionn, Ir. Cuileann. Cf. 1st Holm, Hulver. Source: Websters Dictionary (01 Mar 1998) |
| hollyhock | <botany> A species of Althaea (A. Rosea), bearing flowers of various colours. Synonym: rose mallow. Origin: OE. Holihoc; holi holy + hoc mallow, AS. Hoc; cf. W. Hocys mallows, hocys bendigaid hollyhock, lit, blessed mallow. Prob. So named because brought from the Holy Land. See Holy. Source: Websters Dictionary (01 Mar 1998) |
| holm | <botany> A common evergreen oak, of Europe (Quercus Ilex). Synonym: ilex, and holly. Origin: OE, prob. From AS. Holen holly; as the holly is also called holm. See Holly. 1. An islet in a river. 2. Low, flat land. "The soft wind blowing over meadowy holms. <zoology>" (Tennyson) Holm thrush, the missel thrush. Origin: AS. Holm, usually meaning, sea, water; akin to Icel. Holmr, holmr, an island, Dan. Holm, Sw. Holme, G. Holm, and prob. To E. Hill. Cf. Hill. Source: Websters Dictionary (01 Mar 1998) |
| Holmes heart | A variant of double inlet left ventricle where the ventricular-arterial connection is concordant and the right ventricle is rudimentary. Horizontal heart, description of the heart's electrical position; recognised in the electrocardiogram when the QRS in lead aVL resembles that in V6 and QRS in aVF resembles that in V1; also, loosely, when the electrical axis lies between -30 |
| Holmes' stain | <technique> A silver nitrate staining method for nerve fibres. (05 Mar 2000) |
| Holmes, Oliver Wendell | <person> American physician, identified the mode of spread and control of puerperal fever, thus saving innumerable young women's lives. (05 Mar 2000) |
| Holmes, Sir Gordon | <person> English neurologist, 1876-1965. See: Holmes-Adie pupil, Holmes-Adie syndrome, Stewart-Holmes sign. (05 Mar 2000) |
| Holmes, Thomas | <person> U.S. Psychiatrist, *1918. See: Holmes-Rahe questionnaire. (05 Mar 2000) |
| Holmes-Adie pupil | <syndrome> A condition manifested by usually one tonic pupil with absent tendon reflexes. An idiopathic postganglionic denervation of the parasympathetically innervated intraocular muscles, usually complicated by signs of aberrant regeneration of these nerves: a weak light reaction with segmental palsy of iris sphincter, a strong slow near response. Deep tendon reflexes, particularly ankle and knee, are often asymmetrically reduced. See: tonic pupil. Synonym: Adie's pupil, Holmes-Adie pupil, Holmes-Adie syndrome, pupillotonic pseudotabes. (05 Mar 2000) |
| Holmes-Adie syndrome | <syndrome> A condition manifested by usually one tonic pupil with absent tendon reflexes. An idiopathic postganglionic denervation of the parasympathetically innervated intraocular muscles, usually complicated by signs of aberrant regeneration of these nerves: a weak light reaction with segmental palsy of iris sphincter, a strong slow near response. Deep tendon reflexes, particularly ankle and knee, are often asymmetrically reduced. See: tonic pupil. Synonym: Adie's pupil, Holmes-Adie pupil, Holmes-Adie syndrome, pupillotonic pseudotabes. (05 Mar 2000) |
| Holmgren's wool test | A test for colour blindness, in which the subject matches variously coloured skeins of wool. (05 Mar 2000) |
| Holmgren, Alarik | <person> Swedish physiologist, 1831-1897. See: Holmgren's wool test. (05 Mar 2000) |