What is the meaning of colour tube?

noun

WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). colour tube. Retrieved September 23, 2026, from http://smartdefine.org/colour_tube/definitions/1266576
ChicagoWordNet. 2010. "colour tube" http://smartdefine.org/colour_tube/definitions/1266576 (accessed September 23, 2026).
HarvardWordNet 2010, colour tube, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/colour_tube/definitions/1266576>.
MLAWordNet. "colour tube" 23 October 2010. Web. 23 September 2026. <http://smartdefine.org/colour_tube/definitions/1266576>