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
- Gonopore, a genital pore present in some invertebrates, particularly insects
- An opening across both inner and outer bacterial membranes, a part of many Gram-negative bacterial secretion systems
- One of the openings communicating with the skin surface at the terminus of lactiferous ducts 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
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