plural of audion tube

(anatomy) hollow longitudinal dorsal tube formed in the folding and subsequent fusion of the opposite ectodermal folds in the embryo that gives rise to the brain and spinal cord

(botany) a vessel that conveys sap

A bronchus

plural of hot tube

plural of test tube

plural of tube top

An electronic amplifier device invented in 1906, the forerunner of the triode.

An early experimental electrical discharge tube by means of which cathode rays and X-rays were discovered.

(cycling) A tube in the bicycle frame that connects the bottom bracket shell to the head tube.