Cannula, used alone or in combination with other words, has several meanings. It derives from the Latin "little reed"; and often refers to a tube.
Biology
Cannulae (archaea), hollow tubes found on the surface of some archaea, allowing them to establish contact with each other
Medicine and Technology Technology and medicine Cannula Nasal cannula Cannula transfer Karman cannula Cannulated cow Cannulated screws (orthopedic implants) Cannula transfer or cannulation, a subset of air-free techniques used with a Schlenk line
Zoology Cannula is a genus of straw-mimicking grasshoppers in the family Acrididae
See also Cannuli (surname)