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
  Gonopore
  A gonopore, sometimes called a gonadopore, is a genital pore in many invertebrates. Hexapods, including insects have a single common gonopore, except mayflies, which have a pair of gonopores...
  
  , 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 duct
  Lactiferous duct
  Lactiferous ducts lead from the lobules of the mammary gland to the tip of the nipple. They are also referred to as galactophores, galactophorous ducts, mammary ducts, mamillary ducts and milk ducts...
  
  s in milk-producing mammals

Plant biology

• Stoma
  Stoma
  In botany, a stoma is a pore, found in the leaf and stem epidermis that is used forgas exchange. The pore is bordered by a pair of specialized parenchyma cells known as guard cells that are responsible for regulating the size of the opening...
  
  , 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

Cell and molecular biology

• Nuclear pore
  Nuclear pore
  Nuclear pores are large protein complexes that cross the nuclear envelope, which is the double membrane surrounding the eukaryotic cell nucleus. There are about on average 2000 nuclear pore complexes in the nuclear envelope of a vertebrate cell, but it varies depending on cell type and the stage in...
  
  , 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
  Aquaporin
  Aquaporins are proteins embedded in the cell membrane that regulate the flow of water.Aquaporins are integral membrane proteins from a larger family of major intrinsic proteins that form pores in the membrane of biological cells....
  
  

Physical sciences

• One of many small openings in a solid substance of any kind that contribute to the substance's porosity
  Porosity
  Porosity or void fraction is a measure of the void spaces in a material, and is a fraction of the volume of voids over the total volume, between 0–1, or as a percentage between 0–100%...
  
   (typical usage in earth sciences, materials science and construction)
• A small defect in the crystal structure that may arise during sintering
  Sintering
  Sintering is a method used to create objects from powders. It is based on atomic diffusion. Diffusion occurs in any material above absolute zero, but it occurs much faster at higher temperatures. In most sintering processes, the powdered material is held in a mold and then heated to a temperature...
  
   to form solids from powders, including ceramics

Other uses

• Pore, Casanare
  Pore, Casanare
  Pore is a town and municipality in the Department of Casanare, Colombia....
  
  , a town and municipality in the Department of Casanare, Colombia
• Ryan Pore
  Ryan Pore
  Ryan Pore is an American soccer player who is currently without a club.-Youth and College:Pore attended Madison Comprehensive High School, and played college soccer at the University of Tulsa, where in 2004 he was a finalist for the Hermann Trophy, twice named first team All-American, and the top...
  
  (born 1983), American soccer player