Pore 559499 222050980 2008-06-27T09:30:20Z 83.171.245.168 {{wiktionary|pore}} {{Distinguish|poor|poore|pour}} '''Pore''' may refer to: In '''animal biology and microbiology''': * [[Sweat pore]], an anatomical structure of the skin of humans (and other mammals) used for secretion of sweat * [[Canal pore]], an anatomical structure that is part of the lateral line sense system of some aquatic organisms * An opening across both inner and outer bacterial membranes, a part of many [[Secretion#Secretion_in_Gram_negative_bacteria|Gram-negative bacterial secretion systems]] * One of the openings communicating with the skin surface at the terminus of [[lactiferous duct]]s in milk-producing mammals In '''plant biology''' * [[Stoma]], a small opening on a plant leaf used for gas exchange * An anatomical feature of the [[anther]] in some plant species, the opening through which pollen is released * A characteristic surface feature of [[porate pollen]] In '''cell & molecular biology''': * [[Nuclear pore]], a large protein complex that penetrates the nuclear envelope in eukaryotic cells * [[Ion channel pore]]; The ion-selective opening in the membrane of a eukaryotic cell formed by members of the [[ion channel]] family of proteins * A water-selective opening (water channel) in the membrane of a eukaryotic cell formed by assemblies of the protein [[aquaporin]] In the '''physical sciences''': * One of many small openings in a solid substance of any kind that contribute to the substance's [[porosity]] (typical usage in earth sciences, materials science and construction) * A small defect in the crystal structure that may arise during [[sintering]] to form solids from powders, including ceramics ==See also== * [[Aperture]] {{disambig}} [[de:Pore]] [[fr:Pore]] [[nl:Porie]] [[ja:毛穴]] [[simple:Pore]] [[sv:Por]]