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Pufferfish vs Undefined - What's the difference?

pufferfish | undefined |

As a noun pufferfish

is any species of fish of the family tetraodontidae that have the ability to inflate themselves to a globe several times their normal size by swallowing water or air when threatened; puffer, blowfish, swellfish, balloonfish, globefish.

As an adjective undefined is

lacking a definition or value.

pufferfish

English

(wikipedia pufferfish) (wikispecies)

Noun

(en-noun)
  • Any species of fish of the family Tetraodontidae that have the ability to inflate themselves to a globe several times their normal size by swallowing water or air when threatened; puffer, blowfish, swellfish, balloonfish, globefish.
  • A delicacy popular in Japan served raw as sushi that may, if improperly prepared, contain deadly levels of neurotoxins; (Japanese) fugu .

    • Synonyms

    * (fish) balloonfish, blowfish, globefish, puffer, swellfish * (dish) fugu

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined