| D1 | diagonal one; first dorsal vertebra |
|---|---|
| F1, | F2 etc. first, second, etc., filial generation |
| FA | false aneurysm; Families Anonymous; Fanconi anemia; far advanced; fatty acid; febrile antigen; femor... |
| FAI | first aid instruction; free androgen index; functional aerobic impairment; functional assessment inv... |
| FDI | first dorsal interosseous [muscle]; International Dental Federation [Federation Dentaire Internation... |
| tubouterine pregnancy | Development of the fertilised ovum in the uterine portion of the fallopian tube. Synonym: interstitial pregnancy, tubouterine pregnancy. (05 Mar 2000) |
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| twin pregnancy | A pregnancy that may result from the fertilization of two separate ova or of a single ovum. See: twin. Synonym: bigeminal pregnancy. (05 Mar 2000) |
| extraamniotic pregnancy | A pregnancy in which the chorion is intact, but the amnion has ruptured and shrunk. Synonym: graviditas examnialis. (05 Mar 2000) |
| extrachorial pregnancy | Pregnancy in which the membranes rupture and shrink, causing the foetus to develop outside the chorionic sac but within the uterus. Synonym: graviditas exochorialis. (05 Mar 2000) |
| extramembranous pregnancy | A pregnancy in which during the course of gestation the foetus has broken through its envelopes, coming directly in contact with the uterine walls. (05 Mar 2000) |
| extrauterine pregnancy | A gestation elsewhere than in the uterus. Often occurring in the fallopian tube. Presents with abdominal pain, fainting, and/or vaginal bleeding. (27 Sep 1997) |
| fallopian pregnancy | <obstetrics> An ectopic pregnancy that involves the development of the embryo within the fallopian tube. This can result in a surgical emergency when the developing embryo reaches a critical size. (27 Sep 1997) |
| false pregnancy | <obstetrics, psychiatry> A condition in which some signs and symptoms suggest pregnancy, although the woman is not pregnant. Synonym: hysterical pregnancy, pseudocyesis, pseudopregnancy, spurious pregnancy. (05 Mar 2000) |
| uterine pregnancy | Development of foetus within the uterus. (05 Mar 2000) |
| uteroabdominal pregnancy | Development of the ovum primarily in the uterus and later, in consequence of the rupture of the uterus, in the abdominal cavity. (05 Mar 2000) |
| Abbe test plate | <equipment> A long, wedge-shaped coverslip about 0.20 mm thick at one end and 0.10 to 0.12 mm at the other end coated chemically with a silver film on which are ruled horizontal lines. at each variation in thickness of 0.01 mm there are vertical lines. By means of oblique illumination and by focusing on different portions of the plate, it is possible to determine the optimum coverslip thickness for any objective and also, for microscopes with drawtubes, the tube length for best objective performance. The approximate freedom from spherical and chromatic aberrations can also be estimated. Small isolated bits of silver near the edges of the lines form good objects for the star test (05 Aug 1998) |
| acetone test | A test for ketonuria; the suspected urine is shaken up with a few drops of sodium nitroprusside, and strong ammonia water is then gently poured over the mixture; if acetone is present, a magenta ring forms at the line of contact; tablets containing sodium nitroprusside and alkali are now more commonly used. (05 Mar 2000) |
| achievement test | A standardised test used to measure acquired learning, e.g., competence in a specific subject area such as reading or arithmetic, in contrast to an intelligence test which is a useful index of potential ability or learning. (05 Mar 2000) |
| acidified serum test | Lysis of the patient's red cells in acidified fresh serum, specific for paroxysmal nocturnal haemoglobinuria. Synonym: Ham's test. (05 Mar 2000) |
| acid loading test | <nephrology> This is a test used in the diagnosis of renal tubular acidosis. The patient takes ammonium chloride capsules for 3 days to acidify the blood (lower blood pH). A sample of the urine and the blood is then collected and the results are interpreted. (27 Sep 1997) |