| FAC | familial adenomatosis coli; femoral arterial cannulation; ferric ammonium citrate; 5-fluorouracil, A... |
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| FAF | fatty acid free; fibroblast-activating factor |
| FAI | first aid instruction; free androgen index; functional aerobic impairment; functional assessment inv... |
| FASC | free-standing ambulatory surgical center |
| FC | fasciculus cuneatus; fast component [of a neuron]; febrile convulsions; feline conjunctivitis; ferri... |
| free-hearted | Open; frank; unreserved; liberal; generous; as, free-hearted mirth. Free"-heartedly, Free"-heartedness. Source: Websters Dictionary (01 Mar 1998) |
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| free induction decay | In magnetic resonance imaging, the decay curve that is detected by the radiofrequency coil after the application of an excitation pulse, without additional pulses (free). (05 Mar 2000) |
| free macrophage | An actively motile macrophage typically found in sites of inflammation. (05 Mar 2000) |
| free mandibular movements | Any mandibular movement's made without tooth interference, any uninhibited movement's of the mandible. (05 Mar 2000) |
| free-milling | Yielding free gold or silver; said of certain ores which can be reduced by crushing and amalgamation, without roasting or other chemical treatment. Source: Websters Dictionary (01 Mar 1998) |
| free nerve endings | A form of peripheral ending of sensory nerve fibres in which the terminal filaments end freely in the tissue. Synonym: terminationes nervorum liberae. (05 Mar 2000) |
| free radical | A chemically active atom or molecular fragment containing a chemical charge due to an excess or deficient number of electrons. Radicals seek to receive or release electrons in order to achieve a more stable configuration, a process that can damage the large molecules within cells. See: Oxidation. (09 Oct 1997) |
| free radical reductase | <enzyme> Catalyses conversion of carbon-centreed lipid radicals into an inactive species by utilizing vitamin e at one end and glutathione at the other Registry number: EC 1.8.4.- (26 Jun 1999) |
| free radicals | Highly reactive molecules with an unsatisfied electron valence pair. Free radicals are produced in both normal and pathological processes. They are proven or suspected agents of tissue damage in a wide variety of circumstances including radiation, damage from environment chemicals, and aging. Natural and pharmacological prevention of free radical damage is being actively investigated. (12 Dec 1998) |
| free radical scavengers | Substances that influence the course of a chemical reaction by ready combination with free radicals. Among other effects, this combining activity protects pancreatic islets against damage by cytokines and prevents myocardial and pulmonary perfusion injuries. (12 Dec 1998) |
| free-swimming | <zoology> Swimming in the open sea; said of certain marine animals. Source: Websters Dictionary (01 Mar 1998) |
| free tenia | See: teniae coli. Synonym: tenia libera. (05 Mar 2000) |
| free thyroxine index | An arbitrary value obtained by multiplying the triiodothyronine uptake by the serum thyroxine concentration; it largely corrects for variations in thyroid-bound globulin concentration by providing a clinically valid estimate of the physiologically active free thyroxine; direct assay or laboratory measurement of free serum thyroxine yields a more accurate value. (05 Mar 2000) |
| free villus | A chorionic villus that is not attached to the decidua basalis, but is "free" in the maternal blood of the intervillous spaces. Synonym: floating villus. (05 Mar 2000) |
| free water | Water in the body that can be removed by ultrafiltration and in which substances can be dissolved. (05 Mar 2000) |