1) Canal 2) Channel 3) Duct 4) Epithelial duct 
In anatomy, a canaliculus is a small passageway. Examples include: ...
• (n.) A minute canal.
(from the article `digestive system, human`) ...endothelium, probably for the transport of lymph. On neighbouring surfaces the hepatocytes are bound to one another by dense, tight junctions. ...
A small canal or channel. ... See: iter. ... Origin: L. Dim. Fr. Canalis, canal ... (05 Mar 2000) ... 
(kan″ә-lik´u-lәs) pl. canalic´uli an extremely narrow tubular passage or channel. adj., canalic´ular., adj. bile canaliculi fine tubular channels forming a three-dimensional network within the parenchyma of the liver. They join to form the bile ductules ...
Can`a·lic'u·lus noun ; plural Canaliculi . [ Latin ] (Anat.) A minute canal. 
Type: Term Pronunciation: kan′ă-lik′yū-lŭs, -lī Definitions: 1. A small canal or channel.
(kan;ua-lik;yuu-lus) A microscopic channel in bone tissue that connects lacunae.
[n] - a small canal or duct as in some bones and parts of plants
canaliculus, little canal.
noun a small canal or duct as in some bones and parts of plants
diminutive of canal.