Hollow, cylindrical structures lined with basidia and open at one end as a pore; characteristic of boletes and polypores.
A long hollow passage in the body.
A soft flexible pipe for carrying liquid or gas.
A soft plastic or metal pipe, sealed at one end and with a lid at the other, used to dispense a paste or gel.
A long hollow cylindrical structure, e.g. a fallopian tube.
A tube-shaped object with an empty center.