Definition of «tight cylinder»

The phrase "tight cylinder" refers to something that is structured like a tube shape and is very compact and closely packed together.

Roll into tight cylinder like a burrito. (vegetariantimes.com)
Then comes the fun part: Tuck in the ends and wrap them into tight cylinders like burritos. (bonappetit.com)
Fold over the remaining long edge and compress to form a tight cylinder. (smittenkitchen.com)
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