funnel (fun´el)

1. A hollow conical vessel with a tube of variable length proceeding from its apex, used in pouring fluids from one container to another, in filtering, etc. 2. In anatomy, an infundibulum.
Büchner f. a porcelain f. that contains a perforated porcelain plate upon which filter paper can be laid.
Martegiani's f. the funnel-shaped dilation on the optic disk that indicates the beginning of the hyaloid canal.Martegiani's area;
pial f. the pia-lined channel in which each blood vessel entering the brain lies suspended; essentially, the pial f.'s are perivascular extensions of the subarachnoid space.


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