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focus[fo´kus] (pl. fo´ci) (L.)
1. the point of convergence of light rays or sound waves.
2. the chief center of a morbid process.
Ghon focus the primary parenchymal lesion of primary pulmonary tuberculosis in children; when associated with a corresponding lymph node focus, it is known as the primary or Ghon complex. Called also Ghon tubercle.
grid focus in radiology, a determination made by drawing an imaginary line from the outside of the width of the grid to where it intersects with a centering point. Called also grid radius.
Plural of focus.
A plural of focus.
fociPlural of focus. While this is generally pronounced in the UK as it is in the US, there exists a less common UK-specific pronunciation, which is usually used at an academic level.
Medspeak-UK: pronounced, faux KAI
Medspeak-US: pronounced, faux SAI