Hydroflask

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A device for carrying out polymerization under pressure.

    "The denture is removed just as the material becomes rubbery, and further polymerization carried out in a hydroflask under pressure."

  2. 2
    A thermos-like vacuum flask with a handle on its lid, used to contain water, coffee, or other beverages (from a genericized trademark).

    "Canyon Cultivation director of operations Timothy McMurray sips the bold, rich brew—made with Guatemalan beans roasted by award-winning Coda Coffee in Denver—from a hydroflask throughout the day."

Example

More examples

"My mom gave me a HydroFlask that was left long ago by a student from the school where she works, so she wouldn't have to buy one at full price."

Etymology

From hydro- + flask.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.