D0384400 (drô′to͞ob′, -tyo͞ob′)n. A tube that slides within another tube, as in a small hand telescope.
drawtube
(ˈdrɔːˌtjuːb) n (General Engineering) a tube, such as one of the component tubes of a telescope, fitting coaxially within another tube through which it can slide
draw•tube
(ˈdrɔˌtub, -ˌtyub)
n. a tube sliding within another tube, as the tube carrying the eyepiece in a microscope. [1890–95]Translationsтубус