Main Entry: ¹tube

Pronunciation: \ˈt(y)üb\

Function: noun

1 : a slender channel within a plant or animal body : duct—see bronchial tube, eustachian tube, fallopian tube
2 a : an often complex piece of laboratory or technical apparatus usually of glass and commonly serving to isolate or convey a product of reaction <a distillation tube> b : test tube
3 : a soft tubular container whose contents (as toothpaste) can be dispensed by squeezing
4 : a hollow cylindrical device (as a cannula) used for insertion into bodily passages or hollow organs for removal or injection of materials