| HRL | head rotation to the left |
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| HRR | head rotation to the right; heart rate range |
| HS | Haber syndrome; half strength; hamstring; hand surgery; Hartmann solution; head sling; healthy subje... |
| HTS | head traumatic syndrome; HeLa tumor suppression; human thyroid-stimulating hormone, human thyroid st... |
| IHT | insulin hypoglycemia test; intravenous histamine test; ipsilateral head turning |
| Head's lines | Bands of cutaneous hyperesthesia associated with acute or chronic inflammation of the viscera. Synonym: Head's zones, tender lines, tender zones. (05 Mar 2000) |
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| Head's zones | Bands of cutaneous hyperesthesia associated with acute or chronic inflammation of the viscera. Synonym: Head's zones, tender lines, tender zones. (05 Mar 2000) |
| head tetanus | A type of local tetanus that follows wounds to the face and head; after a brief incubation (1-2 days) the facial and ocular muscles become paretic yet undergo repeated tetanic spasms. The throat and tongue muscles may also be affected. Synonym: cerebral tetanus, head tetanus, hydrophobic tetanus, rose cephalic tetanus, Rose's cephalic tetanus. (05 Mar 2000) |
| head-tilt | An abnormal position of the head adopted to prevent double vision resulting from underaction of the vertical ocular muscles. (05 Mar 2000) |
| head tremors | Head movements associated with congenital nystagmus, spasmus nutans, and miner's nystagmus. Synonym: head tremors. (05 Mar 2000) |
| saddle head | Craniosynostosis in which the upper surface of the skull is concave, presenting a saddle-shaped appearance in profile. Synonym: saddle head. Origin: clino-+ G. Kephale, head (05 Mar 2000) |
| hourglass head | In congenital syphilis, a skull with depressed coronal suture. (05 Mar 2000) |
| humeral head | The name applied to the heads of forearm muscles that attach to the humerus. Nomina Anatomica lists humeral heads (caput humerale...) of the following: 1) flexor carpli ulnaris muscle (... Musculi flexoris carpi ulnaris ); 2) pronator teres muscle (... Musculi pronatoris teretis ). Synonym: caput humerale. (05 Mar 2000) |
| short head | For a muscle with two heads of origin (a "biceps" muscle), the head originating nearest the insertion. See: short head of biceps brachii muscle, short head of biceps femoris muscle. Synonym: caput breve. (05 Mar 2000) |
| snake's-head | <botany> The Guinea-hen flower; so called in England because its spotted petals resemble the scales of a snake's head. <botany> Snake's-head iris, an iridaceous plant (Hermodactylus tuberosus) of the Mediterranean region. The flowers slightly resemble a serpent's open mouth. Source: Websters Dictionary (01 Mar 1998) |
| sperm head | The anterior, usually ovoid, nucleus-containing part of spermatozoa. (12 Dec 1998) |
| death's-head | A naked human skull as the emblem of death; the head of the conventional personification of death. "I had rather be married to a death's-head with a bone in his mouth. <zoology> " (Shak) Death's-head moth, a very large European moth (Acherontia atropos), so called from a figure resembling a human skull on the back of the thorax. Synonym: death's-head sphinx. Source: Websters Dictionary (01 Mar 1998) |
| swollen head syndrome | <syndrome> A disease of chickens caused by the turkey rhinotracheitis virus. (05 Mar 2000) |
| drusen of the optic nerve head | Basophilic, laminated, calcareous acellular masses that resemble crystals within the nerve head, anterior to the lamina cribrosa, that may simulate papilledema and/or cause visual field defects. Synonym: intrapapillary drusen. (05 Mar 2000) |
| intra-articular ligament of costal head | Transverse fibres extending within the capsule from the ridge between the two facets on the head of the rib to the intervertebral disk. Synonym: ligamentum capitis costae intra-articulare. (05 Mar 2000) |