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Definition of oobleck

oobleck

/ˈuːblɛk/
oo · bleck
Plural:ooblecks
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oobleck Lexical Profile

oobleck Game Scores & Validity

• noun

1

A non-Newtonian fluid composed of cornstarch suspended in water that behaves like a solid when subjected to sudden force or pressure and flows like a liquid when poured slowly.

Example

"The science teacher mixed cornstarch and water so the students could test how oobleck hardens when punched."

• Nearby Words

onus
onward
onyx
oobleck
oodles
oof
ooh

Word Origin & Etymology

Coined in 1949 by the American author Dr. Seuss (Theodor Seuss Geisel) in his children's book "Bartholomew and the Oobleck", where it referred to a sticky green substance falling from the sky.

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Oobleck. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/oobleck
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