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 optical system. SEE ALSO: point. SYN: point (1). SEE ALSO: point, tip, end, center. [L. a prick, point, pp. ntr. of pungo, to prick, used as noun]
- p. cecum the blind spot in the visual field corresponding to the location of the optic disk.
- p. coxale the highest point of the crest of the ilium.
- p. dolorosum Valleix points, under point.
- p. fixa [TA] SYN: fixed end.
- kissing puncta a condition in which the upper p. is apposed to the lower p. when the eyes are open.
- lacrimal p. [TA] the minute circular opening of the lacrimal canaliculus, on the margin of each eyelid near the medial commissure. SYN: p. lacrimale [TA], lacrimal opening.
- p. lacrimale [TA] SYN: lacrimal p..
- p. luteum SYN: macula of retina.
- p. mobile [TA] SYN: mobile end.
- p. ossificationis SYN: ossification center.
- p. ossificationis primarium SYN: primary ossification center.
- p. ossificationis secundarium SYN: secondary ossification center.
- p. proximum (P.p.) SYN: near point.
- p. remotum (P.r.) SYN: far point.
- p. vasculosum one of the minute dots seen on section of the brain, due to small drops of blood at the cut extremities of the arteries.

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punc·tum 'pəŋ(k)-təm n, pl punc·ta -tə a small area marked off from a surrounding surface <insect bites...may show the central tiny hemorrhagic \punctum (Jour. Amer. Med. Assoc.)> see LACRIMAL PUNCTUM

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n. (pl. puncta)
(in anatomy) a point or small area, especially the puncta lacrimalia - the two openings of the tear ducts in the inner corners of the upper and lower eyelids (see lacrimal apparatus).

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punc·tum (pungkґtəm) pl. puncґta [L.] 1. a tiny spot or point. 2. anatomical nomenclature for a point or other tiny area.

Medical dictionary. 2011.

Look at other dictionaries:

  • punctum — ● punctum nom masculin (latin punctum, point) Punctum cæcum, point où la rétine ne transmet aucune sensation et qui correspond au point d entrée du nerf optique dans le globe de l œil. Punctum proximum, distance minimale à laquelle un objet est… …   Encyclopédie Universelle

  • Punctum — Punc tum, n. [L., a point.] A point. [1913 Webster] {Punctum c[ae]cum}. [L., blind point.] (Anat.) Same as {Blind spot}, under {Blind}. {Punctum proximum}, near point. See under {Point}. {Punctum remotum}, far point. See under {Point}. {Punctum… …   The Collaborative International Dictionary of English

  • Punctum — (lat.), 1) Punkt, s.d.; P. coecum, die Stelle der Netzhaut, an welcher der Sehnerv in das Auge tritt. P. inflexiōnis, Beugungspunkt. P. fixum u. P. mobĭle, s. u. Hebel 1) a) u. c). P. saliens, s. Hüpfender Punkt; 2) zu Schluß einer Rede Andeutung …   Pierer's Universal-Lexikon

  • Punctum — (lat.), Punkt; als Schlußwort einer Rede Andeutung, daß damit etwas Entscheidendes, Unwiderrufbares ausgesprochen ist …   Meyers Großes Konversations-Lexikon

  • Punctum — (lat.), Punkt (s.d.); P. coecum, blinder Fleck, die Stelle der Netzhaut, an welcher der Sehnerv in das Auge tritt; P. salĭens, hüpfender Punkt, die früheste Anlage des Herzens im bebrüteten Ei; bildlich: der wichtigste Punkt, auf den es ankommt …   Kleines Konversations-Lexikon

  • punctum — punto. Se utiliza en la nomenclatura anatómica para designar un ára extremadamente pequeña o punto de proyección Diccionario ilustrado de Términos Médicos.. Alvaro Galiano. 2010 …   Diccionario médico

  • punctum — index vote Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • punctum — (izg. pȕnktum) m DEFINICIJA 1. glazb. pov. znak za jedan ton u menzuralnoj notaciji 2. točka, usp. punktum ETIMOLOGIJA lat.: točka …   Hrvatski jezični portal

  • Punctum — Chant grégorien Plain chant Neumes (1) Punctum Virga (2) Clivis Podatus (3) …   Wikipédia en Français

  • punctum — n. [L. punctum, small hole or spot] A small pit or spot on a surface …   Dictionary of invertebrate zoology

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