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   Slang shortening of X-ray film, an X-ray, a radiograph.


Electromagnetic energy used to produce images of bones and internal organs onto film.

Slang shortening of X-ray film, an X-ray, a radiograph.



Fibulin 5
A protein that belongs to a family of extracellular proteins expressed in the basement membranes of blood vessels. Fibulin 5 may be essential for the polymerization of elastin. Missense mutations in FBLN5, the gene that encodes fibulin 5, appear responsible for 1-2% of cases of age-related macular degeneration (AMD). FBLN5 is located on chromosome 14 in band 14q32.1.

Field, visual
The entire area that can be seen when the eye is directed forward, including that which is seen with peripheral vision.

Fifth cranial nerve
The fifth cranial nerve is the trigeminal nerve. The trigeminal nerve is quite complex. It functions both as the chief nerve of sensation for the face and the motor nerve controlling the muscles of mastication (chewing). Problems with the sensory part of the trigeminal nerve result in pain or loss of sensation in the face. Problems with the motor root of the trigeminal nerve result in deviation of the jaw toward the affected side and trouble chewing. The cranial nerves, the trigeminal nerve included, emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge from the vertebral column. There are twelve cranial nerves.

1. In genetics, the first generation that results from the crossing of two parental lines, as the filial generation. 2. In general, pertaining to the relationship of children, both sons and daughters, to their parents.

An inactive substance used to make a product bigger or easier to handle. For example, fillers are often used to make pills or capsules because the amount of active drug is too small to be handled conveniently.


Film, AP
An X-ray picture in which the beams pass from front-to-back (anteroposterior). As opposed to a PA (posteroanterior) film in which the rays pass through the body from back-to-front.

Film, lateral
An X-ray picture taken from the side.

Film, PA
An X-ray picture in which the beams pass from back-to-front (posteroanterior). As opposed to an AP (anteroposterior) film in which the rays pass through the body from front-to-back.

Film, tear
The liquid layer bathing the cornea and conjunctiva. It creates a perfectly smooth liquid outer layer that polishes the corneal surface, mechanically traps and flushes out foreign bodies and chemicals, contains bacteriostatic substances that inhibit the growth of microorganisms, and reduces the surface friction associated with eyelid blinking and eye movement.

A family of viruses that cause hemorrhagic fever. Filoviruses have single- stranded RNA as their genetic material. Ebola virus and the Marburg virus are both filoviruses.

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