™ / ˈseləteɪp; NAmE / noun
(also ˈsticky tape ) (both BrE ) ( NAmE ˈScotch tape ™) [ U ] clear plastic tape that is sticky on one side, used for sticking things together :
a roll of Sellotape
The envelope was stuck down with Sellotape.
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WORD ORIGIN
1940s: from an alteration of cellulose + tape .