| flat affect | The absence of or diminution in the amount of emotional tone or outward emotional reaction typically shown by others or oneself under similar circumstances; a milder form is termed blunted affect. (05 Mar 2000) |
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| flat bone | A type of bone characterised by its thin, flattened shape, such as the scapula or certain of the cranial bones. Synonym: os planum. (05 Mar 2000) |
| flat chest | A chest in which the anteroposterior diameter is shorter than the average. Synonym: alar chest, pterygoid chest. (05 Mar 2000) |
| flat condyloma | <tumour> A condyloma of the uterine cervix or other site caused by human papilloma virus infection and characterised histologically by koilocytosis without papillomatosis. (05 Mar 2000) |
| flat feet | All babies have flat feet because their arches are not yet built up (anf their feet tend to be plump). (12 Dec 1998) |
| flat flap | A flap in which during transfer the pedicle is left flat or open, i.e., untubed. Synonym: open flap. (05 Mar 2000) |
| flat hand | Loss of normal arches of the hand. Synonym: flat hand. (05 Mar 2000) |
| flat papular syphilid | Eruption of flattened, dull reddish papules, 5 mm to 1 cm in diameter, occurring in secondary syphilis. Synonym: flat papular syphilid. (05 Mar 2000) |
| flat pelvis | A pelvis in which the anteroposterior diameter is uniformly contracted, the sacrum being dislocated forward between the iliac bones. Synonym: pelvis plana. (05 Mar 2000) |
| flat plate | Jargon for plain film. (05 Mar 2000) |
| flat revertant | <cell biology> Variant of a malignant transformed animal tissue cell in which the characteristic high saturation density and piled up morphology have reverted to the flatter morphology associated with nontransformed cells. (18 Nov 1997) |
| flat top waves | Activity in the electroencephalogram having a pattern suggesting a flat top; these wave's are often found in temporal lobe discharges. (05 Mar 2000) |
| flat wart | A smooth, flat, flesh-coloured wart of small size, occurring in groups, seen especially on the face of the young; often associated with common warts of the hands, due to human papilloma virus, commonly, types 3 and 10. Synonym: flat wart, plane wart, verruca plana juvenilis. (05 Mar 2000) |
| Flatau's law | A law concerning the excentric position of the long spinal tracts; the greater the distance the nerve fibres run lengthwise in the cord, the more they tend to be situated toward its periphery. (05 Mar 2000) |
| Flatau, Edward | <person> Polish neurologist, 1869-1932. See: Flatau-Schilder disease, Flatau's law. (05 Mar 2000) |