Canaliculus

In anatomy, a canaliculus is a small passageway.

Examples include:
 * Two functionally different structures in bone:
 * Bone canaliculus, a small channel found in ossified bone for nutrition for example in the Haversian canal
 * A small canal (anatomy) in bone which carries some structure (such as a nerve) through it
 * Canaliculus (parietal cell), an adaptation found on gastric parietal cells
 * The lacrimal canaliculi, several small ducts in the eye
 * The dental canaliculi, the blood supply within a tooth
 * Bile canaliculi, where the bile produced by the hepatocytes is drained
 * Inferior tympanic canaliculus, the passage for the tympanic branch of the glossopharyngeal nerve and inferior tympanic artery
 * Foramen petrosum (canaliculus innominatus), a small occasional opening in the greater wing of the sphenoid bone