punctum

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punctum

 [pungk´tum] (L.)
a point or small spot.
punctum cae´cum blind spot.
punctum lacrima´le (pl. punc´ta lacrima´lia), an opening of a lacrimal duct on the edge of the eyelid.
punctum prox´imum near point.
punctum remo´tum far point.
punc´ta vasculo´sa minute red spots that mark the cut surface of white matter of the brain.

punc·tum

, gen.

punc·ti

, pl.

punc·ta

(pŭngk'tŭm, -tī, -tă), [TA]
1. The tip or end of a sharp process.
2. A minute round spot differing in color or otherwise in appearance from the surrounding tissues.
3. A point on the optic axis of an optic system.
Synonym(s): point (1)

See also: point, tip, end, center.
[L. a prick, point, pp. ntr. of pungo, to prick, used as noun]

punc·tum

, pl. puncta (pŭngk'tŭm, -tă) [TA]
1. The tip of a sharp process.
2. A minute round spot differing in color or otherwise in appearance from the surrounding tissues.
3. The opening into the lacrimal drainage system in the upper and lower eyelids.
Synonym(s): point (1) .
[L. a prick, point, pp. ntr. of pungo, to prick, used as noun]

Punctum

Tiny opening at the inner corners of the upper and lower lids. The area for the beginning of tear drainage.
Mentioned in: Dacryocystitis

punc·tum

, pl. puncta (pŭngk'tŭm, -tă) [TA]
1. Tip or end of a sharp process.
2. Minute round spot differing in color or otherwise in appearance from the surrounding tissues.
Synonym(s): point (1) .
[L. a prick, point, pp. ntr. of pungo, to prick, used as noun]