| irregular bone | One of a group of bones having peculiar or complex forms, e.g., vertebrae, many of the skull bones. Synonym: os irregulare. (05 Mar 2000) |
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| gram-positive asporogenous rods, irregular | <microbiology> A group of irregular rod-shaped bacteria that stain gram-positive and do not produce endospores. (12 Dec 1998) |
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| irregular | Not regular; not conforming to a law, method, or usage recognised as the general rule; not according to common form; not conformable to nature, to the rules of moral rectitude, or to established principles; not normal; unnatural; immethodical; unsymmetrical; erratic; no straight; not uniform; as, an irregular line; an irregular figure; an irregular verse; an irregular physician; an irregular proceeding; irregular motion; irregular conduct, etc. Cf. Regular. "Mazes intricate, Eccentric, intervolved, yet regular Then most when most irregular they seem." (Milton) "Leading the men of Herefordshire to fight Against the irregular and wild Glendower." (Shak) "A flowery meadow through which a clear stream murmured in many irregular meanders." (Jones) Synonym: Immethodical, unsystematic, abnormal, unnatural, anomalous, erratic, devious, crooked, eccentric, unsettled, uneven, variable, changeable, mutable, desultory, disorderly, wild, immoderate, intemperate, inordinate, vicious. Origin: Pref. Ir- not + regular: cf. F. Irregulier. Source: Websters Dictionary (01 Mar 1998) |
| irregular astigmatism | Astigmatism in which different parts of the same meridian have different degrees of curvature. (05 Mar 2000) |
| irregular dentin | Morphologically irregular dentin formed in response to an irritant. Synonym: irregular dentin, irritation dentin, reparative dentin. (05 Mar 2000) |
| irregular emphysema | Emphysema that shows no consistent relationship to any portion of the acinus; always associated with fibrosis. (05 Mar 2000) |
| irregular nystagmus | A nystagmus in which the movements of the two eyes are dissimilar in direction, amplitude, and periodicity. Synonym: dysjunctive nystagmus, incongruent nystagmus, irregular nystagmus. (05 Mar 2000) |
| irregular pulse | Variation in rate of impulses in an artery due to cardiac arrhythmia. (05 Mar 2000) |
| irregular uterine lumen | <radiology> Synechiae, DES, post-op, neoplasm, normal variant, intravasation, endometrial hyperplasia, adenomyosis, embedded IUD, TB, uterine fistula, Gartner duct remnant (12 Dec 1998) |
| bone within a bone | <radiology> STOP heavy metal, S: sickle cell disease, T: Thorotrast, O: osteopetrosis, P: Paget's disease, heavy metals, hypervitaminosis D (12 Dec 1998) |
| acute reflex bone atrophy | Atrophy of bones, commonly of the carpal or tarsal bones, following a slight injury such as a sprain. See: causalgia, reflex sympathetic dystrophy. Synonym: acute reflex bone atrophy, posttraumatic osteoporosis, Sudeck's syndrome. Origin: L. English sweat (05 Mar 2000) |
| air-bone gap | The difference between the threshold for hearing acuity by bone conduction and by air conduction. (05 Mar 2000) |
| Albrecht's bone | A small bone between the basioccipital and basisphenoid. (05 Mar 2000) |
| allogeneic bone marrow transplant | <haematology, procedure> A bone marrow transplant using marrow collected from a matched healthy donor, usually a brother or sister. The risks associated with the transplant increase with age and 50 years of age is generally regarded as the upper limit. (13 Nov 1997) |
| alveolar bone | That portion of bone in either the maxilla or the mandible which surrounds and supports the teeth. (12 Dec 1998) |
| alveolar bone loss | The resorption of bone in the supporting structures of the maxilla or mandible as a result of periodontal disease. (12 Dec 1998) |